|
Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
|
Thread Tools |
3rd Apr 2018, 6:37 pm | #1 |
Triode
Join Date: Dec 2017
Location: Great Yarmouth, Norfolk, UK.
Posts: 15
|
Unknown but working
Anyone know what this unit is? it aperars to be working thought it was a signal generator at first , but it has scale reading in ohms and micofarads mabe a capacitor tester the magic eye valve is working and the output terminals shows a sine wave varable . Had this over 30 years been in the garden shed , amazing it seams to work what ever it is.
|
3rd Apr 2018, 6:47 pm | #2 |
Octode
Join Date: Jun 2006
Location: St Osyth, Nr Clacton, Essex, UK.
Posts: 1,482
|
Re: Unknown but working
I imagine it's a resistor and capacitor measuring bridge. An oscillator in there would be the input to the bridge and the magic eye would be across the bridge to identify the null.
Graham
__________________
Half my stuff is junk - trouble is, I don't know which half! |
3rd Apr 2018, 7:59 pm | #3 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,195
|
Re: Unknown but working
It looks like a piece of home brew kit built into some ex-gov case.
There were several designs associated with PW, Radio constructor etc in the 50's. If you know the valves it may be possible to trace its origins from there. Ed |
3rd Apr 2018, 8:15 pm | #4 |
Dekatron
Join Date: Aug 2016
Location: Colchester, Essex, UK.
Posts: 4,108
|
Re: Unknown but working
Certainly is a bitzer- Belling Lee terminals and Paignton (Paynton?) knobs, and the indicator light and connectors look MOD origin. I bet you won't ever see another one..
|
3rd Apr 2018, 8:56 pm | #5 |
Dekatron
Join Date: Oct 2003
Location: Croydon, Surrey, UK.
Posts: 7,577
|
Re: Unknown but working
Definitely home-brew. The scale gives it away as everything is hand-written. Yes it would be interesting to try and find the design so perhaps try to identify the valves used. Probably dates to the 50's when lots of Army Surplus gear was available.
__________________
There are lots of brilliant keyboard players and then there is Rick Wakeman..... |
3rd Apr 2018, 9:33 pm | #6 |
Triode
Join Date: Dec 2017
Location: Great Yarmouth, Norfolk, UK.
Posts: 15
|
Re: Unknown but working
I think you are right , i put a capacitor acreoss the terminals and the magic eye closed off to about half . The Valves have typical WD ^ markings on them not checked the part numbers
|
3rd Apr 2018, 10:33 pm | #7 |
Dekatron
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 5,554
|
Re: Unknown but working
It does look like an AC R/C bridge.
I have got a Phillips factory made one that just does resistance but with an external decade box will also do capacitance. It has been superseded by a very posh Marconi one that I recently restored. |