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Life is full of surprises
100dB attenuator made up from six PI stages of ~16.7dB each using standard 0805 resistors I measured its frequency response and was more than a bit surprised how good it was, maintaining to within 1dB of the design value. Have a guess what it's upper frequency limit is - ie where the loss has changed by more than a couple of dB.
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Re: 9 and 6 at OHM?
Nicholas Shaxted
….and the tie-wraps are there to keep the pigeons off
Nick – g4ogi
From: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
On Behalf Of John Fell via groups.io
Sent: 16 May 2021 12:49 To: UKMicrowaves@groups.io Subject: Re: [UKMicrowaves] 9 and 6 at OHM?
Hi Ben, ZME now solid copy here . Pics of my 6cm feed sharing with 10GHHz LNB on my masthead 60cm offset . Have raised mast so dish is approx 9m agl.QTH 66m asl.
6cm feed is a Super VE4MA , with a Franco board /G4DDK modified first stage (NF 1.3dB ) into a 2 stage Mod amp ERA1 based and down to shack via 25 of Sat TV cable into my GPS refed. DB6NT Transverter .
73 John G0API
On Sun, 16 May 2021 at 13:00, militaryoperator via groups.io <Military1944=aol.com@groups.io> wrote:
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Re: 9 and 6 at OHM?
Hi Ben, ZME now solid copy here . Pics of my 6cm feed sharing with 10GHHz LNB on my masthead 60cm offset . Have raised mast so dish is approx 9m agl.QTH 66m asl. 6cm feed is a Super VE4MA , with a Franco board /G4DDK modified first stage (NF 1.3dB ) into a 2 stage Mod amp ERA1 based and down to shack via 25 of Sat TV cable into my GPS refed. DB6NT Transverter . 73 John G0API
On Sun, 16 May 2021 at 13:00, militaryoperator via groups.io <Military1944=aol.com@groups.io> wrote:
.png)
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Re: 9 and 6 at OHM?
militaryoperator
Just shows what a dish can do.
Just tried holding it in front of ant and big signal of OHM.
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Re: 9 and 6 at OHM?
militaryoperator
can u hear me 10 up from ZME?
_._,_._,_
call s20
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Re: 9 and 6 at OHM?
you have more rain down your end John - blanket of light cloud up here - high up
need something more solid to scatter back in your direction Plenty of scatter on 9cms OHM here Graham IO81XV35
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Re: 9 and 6 at OHM?
John Fell
Nothing seen here Graham - beacons still going .... 73 John G0API IO80XS77JR
off now - can hear OHM also but screened by hills - rain clouds high up now
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Re: 9 and 6 at OHM?
off now - can hear OHM also but screened by hills - rain clouds high up now
not too good for RS Graham
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Re: 9 and 6 at OHM?
OK John
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Re: 9 and 6 at OHM?
Martyn G3ZME/P is on Brown Clee at the moment on 24GHZ - 59 here when he points this way
Graham G3VKV
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Re: 9 and 6 at OHM?
John Fell
Not seeing you Graham - try again ? John G0API
can u hear me 10 up from ZME?
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OHM and ZME
John Fell
Have been looking for MCB on 10Ghz - nothing conclusive yet on .890MHz . The 2 plots below show OHM and SCC/ZME - I had Elevation offset on previous pics , so not showing the full signal levels .RS influences on ZME/OHM but SCC at 22km LOS is on normal .905 frequency . 73 John G0API
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Re: 9 and 6 at OHM?
can u hear me 10 up from ZME?
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Re: 9 and 6 at OHM?
militaryoperator
ZME 9++ here Ben on 6cms
Graham G3VKV Gosh, I must be doing something wrong here Graham. I might as well give up !!!!! HI.
Ben
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Re: GB3ZME
militaryoperator
Hi Ben (again) ,
Wrong beacon in my pic - below is ZME .Around 5760.907MHz today .
73
John
G0API
Well, the ZME keying might be a give away John but the f difference is probably the error in the ADF oscillator and the RSP2 set.
cheers, Ben.
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Re: 9 and 6 at OHM?
ZME 9++ here Ben on 6cms
Graham G3VKV
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GB3ZME
John Fell
Hi Ben (again) , Wrong beacon in my pic - below is ZME .Around 5760.907MHz today .
73 John G0API
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Re: 9 and 6 at OHM?
Getting ZME via rainscatter, nice warbling note on it.
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Re: 9 and 6 at OHM?
militaryoperator
Hi Ben,
ZME is running on 6cm .
Not the strongest of signals today .73
John
G0API
Just popping up now and then.
Ben.
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Re: 9 and 6 at OHM?
militaryoperator
Yes.
On an old house that is the community centre where the club QTH is situated
Andy
--------------------
Thanks Andy. In fact, I can just see ZME, coming in and out of the noise but weaker than it is on 9.
Ben.
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