Date   

RE BA2160B Toshiba 24G Amp

F6DRO
 

Hi ,

FYI , a friend of mine tried....He is now looking for another one , the "
prototype" is now dead ( after a few minutes)

73
Dom


Re: BA2160B Toshiba 24G Amp

Andy Talbot <andy.g4jnt@...>
 

There's a very good liklihood of active biassing being employed, in which case some volts will get lost in the drain current-feedback mechanism.  I'm guessing a Vbe  and a few hundred millivolts in a current sense resistor.
 
Just speculating...

Andy  G4JNT
wobbleU cubed .g4jnt.kom


2009/5/28 g4bao <john@...>



I was looking on the www.24ghz.de/ website and looking lovingly at my
BA2106B and note that the site claims that if you run this amp at 6V Vdd
and -1.7V Vgg it produces over 1 Watt. I've only ever run mine to spec
and got about half a watt. 3dB more power on 24G would be really
useful..... but.......

.......having looked at the data sheet I'm a bit skeptical as it quotes
Vdd up to 5.5v FOR <10 seconds only. Also any Google references to using
this amplifier quote verbatim the 24ghz.de site's page.

OK then, hands up, who's actually run one like this, got away with it,
got 1W for more than a few ms, and put it in service and is still using
it today?

Or am I just an old cynic?

John

--
G4BAO
QRV 23,3 and 1.2cm
Beacon keeper GB3CAM/24GHz
http://www.g4bao.com



BA2160B Toshiba 24G Amp

g4bao
 

I was looking on the www.24ghz.de/ website and looking lovingly at my BA2106B and note that the site claims that if you run this amp at 6V Vdd and -1.7V Vgg it produces over 1 Watt. I've only ever run mine to spec and got about half a watt. 3dB more power on 24G would be really useful..... but.......

.......having looked at the data sheet I'm a bit skeptical as it quotes Vdd up to 5.5v FOR <10 seconds only. Also any Google references to using this amplifier quote verbatim the 24ghz.de site's page.

OK then, hands up, who's actually run one like this, got away with it, got 1W for more than a few ms, and put it in service and is still using it today?

Or am I just an old cynic?

John

--
G4BAO
QRV 23,3 and 1.2cm
Beacon keeper GB3CAM/24GHz
http://www.g4bao.com


Re: Activity List for the First 5.7/10/24GHz Cumulative - Sunday 31st May 09:00-20:00 UTC

Peter Day <microwaves@...>
 

Richard Newstead wrote:
I hope to be QRV from Merryton Low IO93ad. I aim to be active from
the top of the hill.

Good luck Richard... every time I've tried to operate from the trig point in recent years I've been asked to leave by the N.Park Ranger! There were no problems twenty years ago and we even took vehicles up there but, since the Mod/ TA have used it to play at soldiers, the Peak Park authority have been awkward.

Hopefully you should be OK since you are back pack portable and will be low profile.

I now use the grassy triangle about 1km south.

I'll be on the Yorkshire Wolds near Pocklington, IO93PW37 ... from 10am BST and will be monitoring 144.175MHz of course.


73

Peter G3PHO


Re: Updated: Activity List for the First 5.7/10/24GHz Cumulative - Sunday 31st May 09:00-20:00 UTC

Ralph
 

Sorry for late entry John.
Just managed to get the 6cm back on the mast today.

Call: G4ALY
Locator IO70VL
Band & Equipment: 5.7 GHz 14W 75cm dish
10 GHz 10W 75cm dish
Talkback: ON4KST and 144.175MHz
Activity 0900-1230 then 1400-1800 then 1900-2000z

73 Ralph

----- Original Message -----
From: "G3XDY" <g3xdy@btinternet.com>
To: <ukmicrowaves@yahoogroups.com>
Sent: Wednesday, May 27, 2009 6:29 PM
Subject: [ukmicrowaves] Updated: Activity List for the First 5.7/10/24GHz Cumulative - Sunday 31st May 09:00-20:00 UTC


I have built the list below from the emails received to date.

There is still time to get your details to me, I intend to send out the
final list on Friday night.
The weather is looking very good for Sunday (Sun block required for the
portables I think), lets hope conditions play ball too.

Call: G3XDY
Locator: JO02OB
Bands & Equipment: 5.7GHz 15W 60cm dish
10GHz 10W 60cm dish
Talkback: ON4KST and 144.175MHz
Activity period: Likely to be 09:00-11:00 and after 18:00 (all UTC)

Call: G8DTF/P
Locator: IO83RO or IO83RP (not decided yet)
Bands & Equipment 10GHz 1.8W 45cm Dish or 20dB horn
Talkback: ON4KST, low power 144.175MHz or Mobile 07802307412
Time: Morning only

Call: G4BAO
Locator: JO02cg
Bands & Equipment:
10GHz 1W 45cm dish
24GHz 300mW 45cm dish
Talkback: ON4KST, Skype johng4bao and 23cms monitoring 1296.200 USB.
434.575 local FM (vertical)
Activity period: Likely to be after 16:00 (UTC)

G3PHO/P: I093PW, Near Pocklington, East Yorkshire
0900-1800UTC
10GHz: 5W 1.2m dish
5.7GHz: 12W 1.2m dish
NO 24GHz
Talkback: Prefered: 144.175MHz SSB 50W 9 ele yagi @ 20ft
If that fails:KST (vodaphone dongle.. if it works)

Call: M0DTS/P and G0EHV/P
Locator: IO94LI
Bands & Equipment: 10GHz 10W 60cm dish (M0DTS)
10GHz 1W 60cm dish (G0EHV)
Talkback: 144.175MHz and ON4KST for part of the period
Activity period: Hopefully set up and QRV 09:00, running all day until
around 17:00 or so (all UTC)

CALL : G6KIE/P + G1MPW/P
LOCATOR : JO00AU
Bands + equipment
10GHZ ..... both stations 1 W .. 60cms dishes
24GHZ .....( With any luck ) 500mW .... 35cms dishes
Talkback ... 144.175MHz 100 W .... 8 element
+ KST


GW3TKH/P IO81LS19 Cefn Y Galchen
5.7/10/24Ghz
Talkback via 2m
mob. phone: 07762885015

EI4GHB/P
I hope to be on 3 rock, just south of Dublin, about 1600feet ASL I think.
60cm Demi 10ghz with 2.5watts.
Should have 2m talkback, definately will have KST and Skype :
tonygallagher_ei4ghb
Will aim to be there at 12 local time.
I can bring 23cm kit also if anyone would like to try!

G3ZME/P. Location Brown Clee IO82QL.
5.7GHz, 10GHz, 24 GHz
Talkback 144.175 MHz (preferred) and KST (likely). Mobile phone 07932 927887
For 24 GHz, may also operate a second site if the activity warrants it -
late afternoon.

GW4DGU/P
Weather willing, I plan to be out on 24GHz for a couple of hours right at
the
beginning of the Contest from Mynydd Preseli.

There is also potential activity from one or two more stations that have
mentioned they will be going out but have not yet provided details.

Please forward this email onto to anyone you think would be interested who
is not a member of the UKmicrowaves Yahoo Group, as I know there are many
who choose not to subscribe.

73

John G3XDY
UKUG Contest Manager



------------------------------------

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Re: Activity List for the First 5.7/10/24GHz Cumulative - Sunday 31st May 09:00-20:00 UTC

Dave Ackrill <dave.g0dja@...>
 

Brian Flynn wrote:
Hi Dave,
I could try 10 G and even 24 G if you are onTuesday or Weds
I am in Edinburgh (io85jv) but have a very clear take-off towards Glasgow

I also hope to do a trial of the larger dish in the week on a trip for work up to Ayr, on Tuesday evening, and a place between Edinburgh and Glasgow on Wednesday evening if I can get the gear sorted out on Monday.
I had a bit of a problem, in that I managed to leave the 12V battery at home in the rush to get off (late) to the hotel in Ayr on Tuesday but Ray (GM4CXM) very kindly helped me out by offering the use of his shack, poles, PSU and well equipped 2M station on Wednesday night.

We did try with Russ (G4PBP) but at nearly 400kM that was always going to be a challenge and then tried some other local contacts without hearing or being heard, other than Gordon (MM3YEQ) using his LNB and 1.3GHz receiver set up who heard us briefly.

Ray did put out a few calls on 144.175 and 144.550MHz and on KST but there was a suggestion that one of the local clubs was holding a DF Hunt, plus the Man U v Barcelona match, would mean that a few of the 10G equipped locals may not have been about.

I'll do some more work on getting the mounting for the dish sorted, and make a check list like I used to have for WBFM, so that hopefully I won't leave a vital component at home next time...

Cheers - Dave (G0DJA)


Re: 10GHz and a distinct lack of success - Confirm TC OK

Brian Flynn GM8BJF
 

David, Gordon,

I can confirm that it is on. I can hear it in Edinburgh with my injection locked LNB on my roof.

Signal is normal strength. Makes a great bistatic rain radar!

73s

Brian GM8BJF.

--- In ukmicrowaves@yahoogroups.com, "David GM6BIG" <aware@...> wrote:

Hi Gordon,

Just a quick update...
I can confirm TC is on and radiating OK.

I can hear it this morning, dish balanced on a table, its usual marginal
self here.
Also a report form Mark GM4ISM in Larkhall, endstopping with him..

Need to meet up and check your gear out !


Cheers, DAvid

----- Original Message -----
From: "Gordon JC Pearce" <gordon@...>
To: <ukmicrowaves@yahoogroups.com>
Sent: Wednesday, May 27, 2009 11:49 PM
Subject: [ukmicrowaves] 10GHz and a distinct lack of success.


I've got a satellite LNB that I picked up at an amateur rally at the
weekend. I built a simple power injector with an RF choke consisting of
3 turns on a 2mm former and a 100pF DC blocking capacitor, and fed 12V
into this arrangement and connected the output to my TH-F7E.

I now have pretty much full-scale noise, falling off a bit towards
600MHz. A little earlier I was able to pick up what I suspect was Ray
GM4CXM sending dashes, all of 4km north of me. I tried picking up
GB3TC, but found that I couldn't hear it until I was approximately 300m
from the transmitter!

When I was there, the signal was very "choppy" and hard to tune, but I
was able to hear the ident once a minute in among the noise.

Presumably this setup is just a little too simple to actually work well.
Has anyone else had much success with this kind of equipment?

Gordon MM3YEQ



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Re: 10GHz and a distinct lack of success

Richard Newstead <g3cwi@...>
 

--- In ukmicrowaves@yahoogroups.com, "Alan Melia" <Alan.Melia@...> wrote:

I had no trouble receiving the local beacon
It is perhaps worth mentioning that the 10GHz cumulatives award points for one way contacts so anyone who wants to test an LNB receiver might try this Sunday and would be a welcome addition to the band. Obviously anyone wanting to have a go would also need KST or (even better) 2m SSB.

73

Richard
G3CWI


Re: Activity List for the First 5.7/10/24GHz Cumulative - Sunday 31st May 09:00-20:00 UTC

JFELL@...
 

Will try to exhume the 6cms system -its still up the mast somewhere.
4W /DB6NT into 60cm offset .

Have given MK1 10GHz transverter 10W TWT and WG switching to Julian G3YGF but can RX on 10GHz if you want a 1 way into Dorset.
Julian does not have KST at home but is on 144MHz talkback when operational.

Only KST due to "fringe" coverage from digi TV - bloody wideband masthead preamps and "pro" installers.....have done for any meaningful 144MHz output from here.

73
John
G0API
IO80XS77

Home phone 01202691649


Re: 10GHz and a distinct lack of success

Alan Melia
 

Hi Gordon, I was tempted to buy at a Rally but when you look at the asking
price and see that CPC is selling a single output dual frequency/dual
polarisation LNB for about 5 including VAT with a stated (but suspect !!)
NF of 0.2dB !! CPC also sell a DC block/injector cheaper than you can but
the connectors for it.

I had no trouble receiving the local beacon which is just less than 1km I
suppose. The signal did disappear when the leaves came out on the trees. I
can confirm these newer LNBs are quite stable I can receive the beacon for
minutes on end using an FRG-9600 as the 618MHz IF on SSB mode.

I find a 0dBm to +10dBm source around 144Mhz fed directly to a Marconi diode
mixer/detector provides a good marker signal for local comparisons and
tests.

Best Wishes
Alan G3NYK


Re: RS Yesterday

Arie Dogterom <pa0ez@...>
 

Hello Sam,
I have been involved in that IARU R1 definition ( it was accepted at the Brighton conference almost 40 years ago) and the text is based on a proposal from PA0MS and me.
At that time there were no commercial VHF-up receivers. The standard was a convertor in front of a 28 of even 4 MHz RX. That is the pure reason for the 20 dB difference between the HF and the VHF-up reference.
One can fight about an S-point being 6dB or something else. If people are using a reasonably calibrated meter than it is worth contemplating. At the time we tought that the dBm values and the 6 dB were a reasonable approach to the existing (ARRL?) system with terms as "very strong" etc. I do not think many people do in fact know what the "non-dBm" definition of S-points are.
I can agree to any deviation of the -93 dBm reference and/or 6 dB step, if that could result in real reporting. But I am rather pessimistic.
Regards
Arie
 

----- Original Message -----
From: SAM JEWELL
Sent: Tuesday, May 26, 2009 3:15 PM
Subject: Re: [ukmicrowaves] RS Yesterday

I know Ari. You have long campaigned for a sensible system.
But I think the definition of VHF/Microwave S9 is set far too high for the reasons I gave in my column and DUBUS.

By any current, common, usage Gerd was 59S here yesterday. Yet by IARU definition he was considerably short of S9? I don't think I am wrong to send S9 if I believe that to be correct and what is expected, but the existing system is clearly unreliable as any sort of meaningful measurement of levels. A range of maybe 20 to 30dB is outrageous.
It was created  based on equipment standards of too many years ago. They need updating, IMHO.
System noise figures of 10 and 20dB, at VHF, belong in the past! A system based on those sorts of equipment sensitivities needs looking at again, surely?

73 de Sam, G4DDK

Flack jacket on.....................



From: Arie Dogterom nl>
To: ukmicrowaves@yahoogroups.com
Sent: Tuesday, 26 May, 2009 1:58:23 PM
Subject: Re: [ukmicrowaves] RS Yesterday



Hello Sam,
It is not the s-scale but the people giving reports out of their black hat. I am always worrying about my rx when reveiving s9 from stations I cannot give more than s4
regards
Arie
 
----- Original Message -----
From: Sam
Sent: Tuesday, May 26, 2009 2:48 PM
Subject: Re: [ukmicrowaves] RS Yesterday


I tried my technique of level measurement on DJ5BVs strong RS signal. He measured up to -112dBm, although a little peak energy will have been lost in the Doppler sidebands.
This is interesting as Gerd was getting so many 59s reports. This equates to about 19dB below an IARU definition of S9!

I'm not raising this as any sort of issue but merely illustrating how misleading the current 'S' system can be!

2 new squares on 3cm. I love the rain!

And 2 new squares (and initials) on 13cm EME this morning.

73 de Sam

Not sent from my PC!

On 26 May 2009, at 12:35, "G3XDY" <g3xdy@btinternet. com> wrote:

One thing I noted in yesterday evening's good RS opening was the way that
dog-leg paths that normally don't seem to work were possible. I heard DJ5BV
(JO30) consistently on a heading of about 165 degrees, he would have been
beaming south of West so the path had a near right angle reflection,
similarly F6APE in IN97 (west south west of the scatter point) was worked on
the same heading. I also had a good backscatter contact with Neil G4BRK.
Signals were not huge, indicating that the losses were higher than on the
more direct paths, but it demonstrates that RS will work over significant
distances in any direction if the storm is sufficiently intense, regardless
of the path geometry.

73

John G3XDY

------------ --------- --------- ------

Yahoo! Groups Links




Re: Reporting (was RS Yesterday)

Arie Dogterom <pa0ez@...>
 

Hello Chris,
Understood. You urged me to my question as you mentioned SSB reception. The bandwidth being around 2,7 kHz the noise level indeed is in the order of more than 40 dB below S9. In practice, taking into account antenna noise ( the Ta being around 145 degr for terrestrial work) the noise level on the meter will be near to S2 in SSB bandwith and S1 in CW bandwidth for practical situations .
Of course there is nothing against negative S-figures as long the correct references are used.
Those having  WSTJ reception see a very strange report on their screen as the receiver used in most cases has a 2,7 kHz bandwidth but the PC processing results in  an effectice bandwidth in the order of one Hz. Here negative SINAD values are common without protests.
The effective noise bandwidth of a trained ear ( brain?) indeed is  making recepotion of signals below noise possible. But I have oserved "qso's" where to my opinion some form of telepathy was used
Regards
Arie

----- Original Message -----
Sent: Wednesday, May 27, 2009 11:22 PM
Subject: Re: [ukmicrowaves] Reporting (was RS Yesterday)

Hello Arie

> Is the mds equal to the noise power ?

Yes. So a signal with the same power as MDS would result in a (signal plus
noise)/noise ratio of 3dB. That's the classic definition of MDS suggested by
Wes Hayward, and used in amateur radio measurements, particularly by the ARRL,
for a very long time.

The MDS in real-life terrestrial communications situations of most good
amateur SSB receivers on 432MHz and up is surprisingly close to -140dBm. That
means that (because of the filtering effect of the human ear which with
experience can have an equivalent noise bandwidth of perhaps 25Hz) it's
possible to read weak CW signals down to about -158 or -160dBm. WSJT can take
that to nearly -170dBm if the path doesn't result in too much signal
spreading.

One of the reasons that I favour a new dBm related reporting system is that
even if we were to re-invent the S scale, we'd end-up with negative S reports!

Vy 73

Chris
GW4DGU


Re: Activity List for the First 5.7/10/24GHz Cumulative - Sunday 31st May 09:00-20:00 UTC

Richard Newstead <g3cwi@...>
 

I hope to be QRV from Merryton Low IO93ad. I aim to be active from the top of the hill. 10GHz 1W 40cm. 2m talkback preferred. KST if I can be bothered with it. Mobile 07976-688359. Probably QRV morning only. May rove if keen enough...

If anyone wants to join me to experience the frenetic thrills of 10G contest operating, please contact me off reflector to arrange - you will be very welcome!

73

Richard
G3CWI


Re: 6cms interference

Robert Price <g8dtf@...>
 

Hi Russ
 
According to the Maplin description it has
 
  • 7 channels for minimum of interference
  •  
    I guess it has to be manually switched to another channel.
     
    regards
     
    Bob
    G8DTF
     
     


    From: Russ Stewart
    To: ukmicrowaves@...
    Sent: Thursday, 28 May, 2009 10:01:01
    Subject: Re: [ukmicrowaves] 6cms interference

    Julie & Stephen wrote:
    >
    >
    > We have problems likewise here in ZL with ISM and more so WL
    > associated noise. Normally perched on a hill and beaming into Auckland
    > city central [50km distance] results in a noise [spaced ever 12 KHz or
    > so] from 5760 - 5764 MHz S4. Infact the last time I was up that hill I
    > had a S9 noise. I assumed a wireless lan that was local.
    >
    > But it's even worse on 2.4 GHz. We have 2396 to 2450 MHz. From 2400 to
    > 2450 is a white wash with noise. And what's worse our NB allocation is
    > on 2424 MHz. There is one advantage I would say. We won't lose it
    > because no one else wants it.
    >
    > At present we have submissions in to our National body to get the NB
    > weak signal segment sifted from 2424 to 2399 MHz. The 2399 is quite...
    >
    > 73 Steve ZL1TPH
    >
    >
    Thanks Steve. I think I have me a cheap video sender. Probably why it is
    not frequency agile. Apparently these are now available from Maplins.

    I need a much bigger 6cms TX Hi.

    Russ ... g4pbp



    Re: 6cms interference

    Russ Stewart <g4pbp@...>
     

    Julie & Stephen wrote:


    We have problems likewise here in ZL with ISM and more so WL associated noise. Normally perched on a hill and beaming into Auckland city central [50km distance] results in a noise [spaced ever 12 KHz or so] from 5760 - 5764 MHz S4. Infact the last time I was up that hill I had a S9 noise. I assumed a wireless lan that was local.
    But it's even worse on 2.4 GHz. We have 2396 to 2450 MHz. From 2400 to 2450 is a white wash with noise. And what's worse our NB allocation is on 2424 MHz. There is one advantage I would say. We won't lose it because no one else wants it.
    At present we have submissions in to our National body to get the NB weak signal segment sifted from 2424 to 2399 MHz. The 2399 is quite...

    73 Steve ZL1TPH

    Thanks Steve. I think I have me a cheap video sender. Probably why it is not frequency agile. Apparently these are now available from Maplins.

    I need a much bigger 6cms TX Hi.

    Russ ... g4pbp


    10GHz and a distinct lack of success - Confirm TC OK

    David GM6BIG <aware@...>
     

    Hi Gordon,

    Just a quick update...
    I can confirm TC is on and radiating OK.

    I can hear it this morning, dish balanced on a table, its usual marginal self here.
    Also a report form Mark GM4ISM in Larkhall, endstopping with him..

    Need to meet up and check your gear out !


    Cheers, DAvid

    ----- Original Message -----
    From: "Gordon JC Pearce" <gordon@gjcp.net>
    To: <ukmicrowaves@yahoogroups.com>
    Sent: Wednesday, May 27, 2009 11:49 PM
    Subject: [ukmicrowaves] 10GHz and a distinct lack of success.


    I've got a satellite LNB that I picked up at an amateur rally at the
    weekend. I built a simple power injector with an RF choke consisting of
    3 turns on a 2mm former and a 100pF DC blocking capacitor, and fed 12V
    into this arrangement and connected the output to my TH-F7E.

    I now have pretty much full-scale noise, falling off a bit towards
    600MHz. A little earlier I was able to pick up what I suspect was Ray
    GM4CXM sending dashes, all of 4km north of me. I tried picking up
    GB3TC, but found that I couldn't hear it until I was approximately 300m
    from the transmitter!

    When I was there, the signal was very "choppy" and hard to tune, but I
    was able to hear the ident once a minute in among the noise.

    Presumably this setup is just a little too simple to actually work well.
    Has anyone else had much success with this kind of equipment?

    Gordon MM3YEQ



    ------------------------------------

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    More relays for sale

    Conrad Farlow <conrad@...>
     

    I found some more relays.

    2 x dB Products 2S2H11 SMA, see http://www.ducommun.com/pdf/DBPM_page_07-08_2S_Series.PDF 12 each
    1 x Charter Engineering B5F-330100/P N type very high isolation, high power (350W cw on 23)

    see http://www.ceiswitches.com/B5.html 30 - this is really nice.

    I also have a West Mountain Radio rig runner 4008, see http://www.wsplc.com/shared/documents/art_158.pdf.

    I have the connectors and I would like 50 for it, hardly used.

    I can take pay pal.

    Regards

    Conrad


    5.7 GHz preamp wanted:

    Julie & Stephen <stephen_hayman@...>
     

    I'm looking for a 5.7G preamp - maybe kits or something that is surplus ...
     
    Something that is reasonably priced maybe.....
     
    Just upgrading my 5.7 [that is only 4 dB N/F] as next project...does not need to be sub 1 dB .....just a bit better than current N/F


    TIA Steve ZL1TPH


    Re: 6cms interference

    Julie & Stephen <stephen_hayman@...>
     

    We have problems likewise here in ZL with ISM and more so WL associated noise. Normally perched on a hill and beaming into Auckland city central [50km distance] results in a noise [spaced ever 12 KHz or so] from 5760 - 5764 MHz S4. Infact the last time I was up that hill I had a S9 noise. I assumed a wireless lan that was local.
     
    But it's even worse on 2.4 GHz. We have 2396 to 2450 MHz. From 2400 to 2450 is a white wash with noise. And what's worse our NB allocation is on 2424 MHz. There is one advantage I would say. We won't lose it because no one else wants it.
     
    At present we have submissions in to our National body to get the NB weak signal segment sifted from 2424 to 2399 MHz. The 2399 is quite...

    73 Steve ZL1TPH


    Re: 10GHz and a distinct lack of success.

    David GM6BIG <aware@...>
     

    Hi Gordon,

    You didnt say what kind of LNB it is, the old analog ones are very noisey and unstable, the digital ones are far far better.

    I use an unmodified LNB (without dish), and have received TC over 40 miles away, often not line of sight.
    The LNB would need to be turned 90 degrees from "normal", (so the F connector(s) are horizontal) to get the correct polarisation.
    TC will be around 721.3MHz at the LNB o/p. The LNBs can be over 1MHz away from that..

    Most digital LNBs work well in terms of freqy stability/drift/noise/shock, although some are Far better than others !

    TC is marginal with me at home, just one spot, reflected off a distant hill, LNB with 80cm dish. I havent got it permanantly mounted yet so not easy for me to listen just now.
    Will have a listen tommorow out portable and let you know if TC is radiating OK !


    Cheers David GM6BIG
    Keeper for GB3TC.

    ----- Original Message -----
    From: "Gordon JC Pearce" <gordon@gjcp.net>
    To: <ukmicrowaves@yahoogroups.com>
    Sent: Wednesday, May 27, 2009 11:49 PM
    Subject: [ukmicrowaves] 10GHz and a distinct lack of success.


    I've got a satellite LNB that I picked up at an amateur rally at the
    weekend. I built a simple power injector with an RF choke consisting of
    3 turns on a 2mm former and a 100pF DC blocking capacitor, and fed 12V
    into this arrangement and connected the output to my TH-F7E.

    I now have pretty much full-scale noise, falling off a bit towards
    600MHz. A little earlier I was able to pick up what I suspect was Ray
    GM4CXM sending dashes, all of 4km north of me. I tried picking up
    GB3TC, but found that I couldn't hear it until I was approximately 300m
    from the transmitter!

    When I was there, the signal was very "choppy" and hard to tune, but I
    was able to hear the ident once a minute in among the noise.

    Presumably this setup is just a little too simple to actually work well.
    Has anyone else had much success with this kind of equipment?

    Gordon MM3YEQ



    ------------------------------------

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