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Sets, Parts and Service Information Offered (private sellers only, exact price required, no swaps) You may announce components or sets for sale or offered free here. Private collectors only - no traders. You must include an exact price. No swaps.

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Old 17th Oct 2021, 11:40 am   #1
Bryan M
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Default What's this? and who wants it?

Appears to be a multistage divider or multiplier, beautifully made, 9 valves. 10, collection much preferred.

Bryan
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Old 17th Oct 2021, 12:03 pm   #2
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Default Re: What's this? and who wants it?

May we have a front view please?
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Old 17th Oct 2021, 4:18 pm   #3
Bryan M
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Default Re: What's this? and who wants it?

The 'front' view is rather boring. Two other views added to show inner details.
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Old 17th Oct 2021, 4:35 pm   #4
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Default Re: What's this? and who wants it?

Hi Bryan

I think this is some sort of sig gen, if not then the spares on it are very useful to me.

Ken
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Old 17th Oct 2021, 5:02 pm   #5
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Default Re: What's this? and who wants it?

Multistage, yes. And with a range switch which selects which stage goes on to whatever comes next. The little white stub shaft looks to drive that precision pot via worm reduction, and I guess drives the capacitors similarly. So the front panel is missing and goes on those nice hex spacers. THe bigger shaft seems to be for the wafer switch. So that's the range switch. The tuning shaft must have a reduction drive to a scale and pointer, maybe a string driven pointer?

Guessing.... the biggest variable C section as a VFO. Then a multiplier. Then the two medium sized variable C tuning a buffer/filter to select a harmonic. Then another multiplier. Then the two small variable C tuning a buffer/filter for the upper band.
So, over 3 octaves of range.

THis could be a sig gen, or perhaps an exciter for a wide range transmitter. Construction is expensive which means military or test-gear (maybe both?)

Interesting. As said, some nice bits!

David
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Old 17th Oct 2021, 5:45 pm   #6
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Default Re: What's this? and who wants it?

I'd love it but I don't need it
Even more, I'd love to know what it's out of
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Old 17th Oct 2021, 8:13 pm   #7
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Default Re: What's this? and who wants it?

Hello Bryan

I would very much like this as I like to study high quality designs in order to pick up tips for my own lesser builds. There are a good number of nice ( read exquisite ) parts that could find their way into a little regenerodyne Rx.
Might you consider courier rather than collection if nobody else can collect? Happy to pay cost plus a little more for the effort!
Regards
Mike

Last edited by VT FUSE; 17th Oct 2021 at 8:36 pm.
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Old 17th Oct 2021, 11:05 pm   #8
Bazz4CQJ
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Default Re: What's this? and who wants it?

During WWII, the US Airforce flew some sets, something like "B342" or similar and I wondered about that initially, but I'm sure the construction is UK. Could some of those sets have been developed for UK use?

The metalwork has a slight whiff of the ADVANCE signal gens for the military.

B
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Old 18th Oct 2021, 2:21 pm   #9
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Default Re: What's this? and who wants it?

Looks like late 1960s era

Chris
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Old 18th Oct 2021, 7:45 pm   #10
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Default Re: What's this? and who wants it?

Could we have the valve lineup please?
Might give a clue.
Might be a wide range test receiver?
That mustard poly cap rules out Metrix.
English or Australian, mid 1950s?

Last edited by Radio1950; 18th Oct 2021 at 8:10 pm.
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Old 20th Oct 2021, 8:07 am   #11
Bryan M
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Default Re: What's this? and who wants it?

Establishing the valve line-up is a challenge too far for me, but a couple of the more accessible ones are ECC81 and 5654 (EF95?). Removing them is difficult and replacing them very difficult.

So to the second part of the title. A coin toss awards it to VTFUSE - PM sent.

Thanks for all your interest.

Bryan
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Old 20th Oct 2021, 9:28 am   #12
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Default Re: What's this? and who wants it?

That looks VERY familiar, but I can't for the life of me think why. Definitely military, and quite likely test equipment based, or airborne wireless from 1960s to mid 70s.

Colin
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