Date   

Re: 6cm PA

Paul Evans W4/VP9KF
 

The FCC has been messing massively with 5GHz recently, which includes amateurs, commercial and 'Native' [red indian, am I supposed to say that????] allocations. There's a chance that there will be much stuff for sale in the USA, which might be like the availability before. Keep searching!

--
73, Paul Evans G4BKI [VP9KF]


G4HUP PIC Board

Michael Scott
 

Hi All

I Have a PCB  marked 16F84 G4HUP July 201x. The last number of the date is obliterated by white resist around a mounting hole.

As well as the 18 pin DIL IC there are a dozen or so other components and four connectors.

Does anyone have a circuit for this unit?

I tried Google, but didn't see it mentioned.

73, Mike, G3LYP


Re: Mouser BOM for DF9IC 1296 amplifier

Nick Gregory G0HIK
 

Thanks for the pointers Neil, I'm sure that will help.

And for the update on the heat spreader

73's

Nick G0HIK


Re: Mouser BOM for DF9IC 1296 amplifier

Neil Smith G4DBN
 

Hi Nick, mine came mostly from Digikey, but they have removed the BOM from my account as it is from way back. Some of these were from Mouser.

I used smaller high-Q trimmers and a padding cap, so one of these could be the padders. I find the gate tuning a bit sharp with the specified trimmers.

Caps I have in my parts box are:
600S470GT250XT

600S8R2BW250XT

100B3R3BW500XT

100B2R2BT500XT

600S3R3AT250XT

Not sure if there are others, don't have time to check in detail sorry, coffee break time at the day job.  Hope that gives you some pointers.

I've got an endless pile of machining jobs over the weekend, some 122 GHz bits to finish, a batch of cooling plates, DF9IC and W6PQL spreaders and a load of transverter kits to pack as well as the remaining Wavelab 23GHz connection/PSU boards. One of the DF9IC spreaders has your name on it. I have an email backlog as long as a long thing, but I'm less than a year behind now.

Neil G4DBN


On 28/05/2021 14:55, Nick Gregory G0HIK via groups.io wrote:
I now have the PCB and transistors for the DF9IC amplifier.

I was looking on Mouser and see they list six types of ATC600S capacitors, not understanding what all the different types are, I wonder if anyone has a Mouser Bill of Materials for this amplifier.

Thanks

Nick G0HIK 
_


Re: 6Cms messing continues

Gareth G4XAT
 

Glad I bought a pair (ages ago for WB FM ATV). More recently I emailed Yagi.pl and asked them the power handling of the panel. 100 watts was the answer......so all we need now is some prime surplus amps like the Stealth or Ionicas.....but for 6cms :-)


Mouser BOM for DF9IC 1296 amplifier

Nick Gregory G0HIK
 

I now have the PCB and transistors for the DF9IC amplifier.

I was looking on Mouser and see they list six types of ATC600S capacitors, not understanding what all the different types are, I wonder if anyone has a Mouser Bill of Materials for this amplifier.

Thanks

Nick G0HIK 


Re: 6Cms messing continues

Garyov
 

Interesting, my flat plate arrived this week, and the rc- 832, a couple of weeks back. The skywing ts2500
Is still in transit. Need to make up a distribution / control unit next. Hope to get live sometime soon from Io82. 
G4BJD 

On 28 May 2021 13:34, "militaryoperator via groups.io" <Military1944@...> wrote:
With the arrival of the flat panel antenna, I thought I'd see how the Dbl Bi-quad, DBQ plus dish (small) and the panel compare.

dbl biquad    -127dbm to -106dbm noise to sig,    21dbm difference
dbq+dish      -127dbm to -98dbm                          29dbm difference
23dbi panel  -127dbm to -93.5dbm                       33.5dbm difference 

Obviously, baseline means nothing but the differences between noise floor and signal are interesting I think. 
The dish is only a small 20-inch petal-type ex sat tv so a bigger one would be better, but more effort to raise, hi.

So, tx side to work on now, hi.

Ben.



6Cms messing continues

militaryoperator
 

With the arrival of the flat panel antenna, I thought I'd see how the Dbl Bi-quad, DBQ plus dish (small) and the panel compare.

dbl biquad    -127dbm to -106dbm noise to sig,    21dbm difference
dbq+dish      -127dbm to -98dbm                          29dbm difference
23dbi panel  -127dbm to -93.5dbm                       33.5dbm difference 

Obviously, baseline means nothing but the differences between noise floor and signal are interesting I think. 
The dish is only a small 20-inch petal-type ex sat tv so a bigger one would be better, but more effort to raise, hi.

So, tx side to work on now, hi.

Ben.


Suitable prescalar for #10ghz

Mike GD6ICR
 

Looking to purchase a prescaler suitable for placing in front of a Victor VC3165 (<2.5Ghz 8 Digit) to allow me to use it on >10GHz. Probably a /5 /4 even /10 any suggestions for pre-built and availability as surface mount is not an area my hands seem good at . TIA
--
Mike GD6ICR IO74PF73TW


Re: 6cm PA

Chris G0WUS
 

Yes Neil the Gan HEMTs would be good as the pallet would be smaller for sure, but sounds like you have as many unfinished projects on the go as I do!!

Real life gets in the way all the time.

73 Chris G0WUS

On 27/05/2021 20:57, Neil Smith G4DBN wrote:
My order for CGHV59070F GaN HEMTs from Digikey is under review, not sure if it is going to be permitted under EAR.  Mouser refuse to sell them to me at all, but the 15W (CGH55015F2) and 30 W (CGH55030F2) HEMTs are available from DK for around £60 and £100 respectively.  That is about the same price as potentially dodgy and second-hand gasfets from Chinese surplus dealers. Might be worth a look at getting some boards made.

For my 12W PA, I used a gasfet and a hacked-up DB6NT board. These devices are unmatched, so need a bit more design effort than the MMICs.

No time to mess with 6cm PAs anyway, still catching up with orders. I am knee-deep in 3cm transverter kits and bits for 2.4 GHz and 3.4 GHz 25 W PAs and still have some Wavelab accessory boards to ship. Real Life is intruding badly into radio at the moment.  Still, I'm on page 25 of the build documentation for the transverters.  Nearly there!

Neil G4DBN

On 26/05/2021 12:32, Chris G0WUS wrote:
Hi all, Just after some ideas for 6cm PA greater than 10W would be nice but need lightness and compactness to mast mount. Several years back there were a plenty full supply of USA ex C band kit but does not seem like much about at present. Any ideas welcomed (well sensible ones HI)

Cheers Chris G0WUS




Re: 6cm PA

Chris G0WUS
 

Sounds like you could build a cracking eme setup David with those PA's but a bit heavy to be mounted at the mast head for sure.

watch you dont roll the RAV4 over in the winds HI

73 Chris G0WUS


On 27/05/2021 19:39, DAVID G4ASR via groups.io wrote:
Hi Chris  ... I'm working on this!   
20-years ago I liberated a small quantity of C-band SSPA's, circa 10W.  Some went into Eu and a few to G-ops.
At the time I wasn't interested in getting active on 6cm. I am now so will be finding out soon if anything can be 'liberated'.

I do have 3 x monstrously heavy C-band shelf units in an outbuilding here. 
Solid-state with a good 100W output, essentially 2 x 50W pa's (on one board) with waveguide combining.
Built in PSU 12V @ 175 Amps!  Two-man lift. 

Co-incidentally, two weeks ago I was given 2 x 1M dishes with integral feed, 5.1 - 5.8GHz, 34dBi. 
https://dl.ubnt.com/guides/rocketdish/RocketDish_RD-5G34_QSG.pdf
Bit heavy, but going to see if I can put one on my RAV4-portable thing as well as 13cm+Yagi and 3cm+Dish.

Who Dares Wins as they say here!
73, David G4ASR   


Re: 6cm PA

Neil Smith G4DBN
 

My order for CGHV59070F GaN HEMTs from Digikey is under review, not sure if it is going to be permitted under EAR.  Mouser refuse to sell them to me at all, but the 15W (CGH55015F2) and 30 W (CGH55030F2) HEMTs are available from DK for around £60 and £100 respectively.  That is about the same price as potentially dodgy and second-hand gasfets from Chinese surplus dealers. Might be worth a look at getting some boards made.

For my 12W PA, I used a gasfet and a hacked-up DB6NT board. These devices are unmatched, so need a bit more design effort than the MMICs.

No time to mess with 6cm PAs anyway, still catching up with orders. I am knee-deep in 3cm transverter kits and bits for 2.4 GHz and 3.4 GHz 25 W PAs and still have some Wavelab accessory boards to ship. Real Life is intruding badly into radio at the moment.  Still, I'm on page 25 of the build documentation for the transverters.  Nearly there!

Neil G4DBN

On 26/05/2021 12:32, Chris G0WUS wrote:
Hi all, Just after some ideas for 6cm PA greater than 10W would be nice but need lightness and compactness to mast mount. Several years back there were a plenty full supply of USA ex C band kit but does not seem like much about at present. Any ideas welcomed (well sensible ones HI)

Cheers Chris G0WUS


Re: Activity List for the UK Microwave Group 5.7GHz and 10GHz Contests - Sunday 30th May

G1DFL
 

Forecast looks to be a fabulous 21C :)


Callsign: G1DFL/P
Locator:  IO91LT
Bands:    5.7GHz 60cm PF Dish, 5W
              10GHz 60cm Offset Dish, 1W
Talkback: 144.390MHz SSB, KST, Zello, 07713 432632
Times:     Approx 10am to 2pm


I can also take 6cm WBFM (2W) if anyone wants to play/test with their FPV gear.


Regards..Pete
G1DFL



Re: Activity List for the UK Microwave Group 5.7GHz and 10GHz Contests - Sunday 30th May

John Lemay
 

Hello John and all

I plan to be QRV:-

Callsign: G4ZTR
Locator: JO01KW
Band: 10GHz, 10w, 1m dish
Talkback: ON4KST
Times: 08:00 onwards

Regards

John G4ZTR

-----Original Message-----
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of John Quarmby via groups.io
Sent: 24 May 2021 22:05
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Activity List for the UK Microwave Group 5.7GHz and 10GHz Contests - Sunday 30th May

The first of the summer series of UKuG 5.7GHz and 10GHz contests takes
place this Sunday, 30th May.

Stations can enter for a maximum operating period of 8 hours between
0600z and 1800z (0700 - 1900BST).

Full rules are here: https://www.microwavers.org/files/2021-mwrules.pdf

The signs are that the weather might be better by then so I hope more
can get out portable.

As usual I will compile an activity list and circulate it on Saturday
29th May, please post your plans in the usual format by 28th May:

Callsign: G3XDY
Locator: JO02OB
Bands: 5.7GHz 15W 60cm dish
10GHz 10W 60cm dish
Talkback: ON4KST and Zello
Times: Various throughout

73

John G3XDY
UKuG Contest Manager


--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Re: Activity List for the UK Microwave Group 5.7GHz and 10GHz Contests - Sunday 30th May

Dave G1EHF
 

Planning to be active on Sunday:

Callsign: G1EHF/P
Locator: IO91GI44
Bands: 5.7GHz 15W 1.1m dish
Talkback: ON4KST and 144.390
Times: 10am BST onwards

Barry, G4SJH/P will be providing 3cm.

Hope to work a few of you.

73, Dave G1EHF


Re: 6cm PA

DAVID G4ASR
 

Hi Chris  ... I'm working on this!   
20-years ago I liberated a small quantity of C-band SSPA's, circa 10W.  Some went into Eu and a few to G-ops.
At the time I wasn't interested in getting active on 6cm. I am now so will be finding out soon if anything can be 'liberated'.

I do have 3 x monstrously heavy C-band shelf units in an outbuilding here. 
Solid-state with a good 100W output, essentially 2 x 50W pa's (on one board) with waveguide combining.
Built in PSU 12V @ 175 Amps!  Two-man lift. 

Co-incidentally, two weeks ago I was given 2 x 1M dishes with integral feed, 5.1 - 5.8GHz, 34dBi. 
https://dl.ubnt.com/guides/rocketdish/RocketDish_RD-5G34_QSG.pdf
Bit heavy, but going to see if I can put one on my RAV4-portable thing as well as 13cm+Yagi and 3cm+Dish.

Who Dares Wins as they say here!
73, David G4ASR   


MIcrowavers Audio Keyer

Andy G4JNT
 

At the end of last year readers will recall the audio tone CW keyer and chirp generators http://g4jnt.com/MicrowaversAudioKeyer.pdf  of which I supplied quite an appreciable number of programmed chips + PCB

An updated version KEYER5 now combines the capabilities of both - simply programme in a blank message to inhibit the prestored CW message and send three sequential tones instead.

I still have PCBs and PICs
go to http://g4jnt.com/BcnKeyer.htm to get your.

All additional components - with the exception of the SOT23 voltage regulator (which isn't essential anyway if you can run it from 2.5 to 5.5V) are available from the Chipbank


Mixers to Chipbank

Michael Scott
 

Hi All

While sorting through a drawer, I came across a strip of five HMC218B double balanced mixers. These are 3.5 -8GHz devices originally from Hittite, but now Analog Devices. They were specified in an early version of Paul Wade's 5.7GHz transverter.

The downside is that they are in a quite small  8pin MSOP package. I did manage to mount one on a test PCB and it worked OK, but I don't have plans to use any more so will donate them to the Chipbank at the next update. In the meantime, if anyone would like to have one or two to play with, send an order on the usual Chipbank form.

They are still available from Mouser, and a data sheet is available from them.

73, Mike, G3LYP.


Re: poor night

Graham G3VKV
 

You could always ask the other station to transmit first - a waterfall display is very useful
and as you say signals don't always arrive from the calculated direction
When you are working all four bands an extra 5 minutes on one QSO can mean you miss 2 or 3 other contacts
The higher you go the harder it gets !
                                               Graham G3VKV


Re: poor night

militaryoperator
 

Hi Ben,
Put a 360 degree protractor around the pole (£1.74 WH Smiths) + pointer
Rotate it to calibrate on a beacon or the first station you hear and away you go
many more contacts.
Direction to point available on KST
                                    Graham G3VKV


Yes, an idea Graham. I do know where the cardinal points are but as you know, just because KST says xdeg one might get a better signal by being either side, reflection, incorrect location, width of a 6 figure reference and so on. 

Still doesn't answer the problem of stations giving up on trying a qso simply because they couldn't hear my narrow beam signal after a few seconds listening, maybe not even on the right freq. 

Still, its only a hobby, hi. 

cheers, Ben. 

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