Bradley electronics - Voltage Calibrator Type "134”

[Erik L]

Dear fellows

Please forgive me if I make any mistake and feel free to correct me as this is my first post on the EEVblog Electronics Community Forum.

I have a request regarding an instrument that I have been collecting from what I like to call “a mine” of vintage instruments (several hundreds of them) here in Norway last year.

Anyways, the brand is “Bradley electronics” and the model is “Voltage Calibrator Type 134”.
I have been looking everywhere on the internet and could not find any traces of it.

The calibrator is working ok considering its age; it’s quite accurate and stable measured against a calibrated meter. I have not opened the beast yet.

From the back side of the instrument, I can see two TT22 and one EL360 tubes.

Does anyone sit on information such as manual / technical specifications?

Any contribution will be much appreciated.

[mrk]

https://www.vintage-radio.net/forum/showthread.php?t=160342 "I have these and other Bradley/Pulsetek manuals (123, 125B, 125C, 134, 156, 158, 171B, 187 counter timer, 192, 200, 232 AC calibrator). "
https://www.vintage-radio.net/forum/showthread.php?t=131406 "Test gear dilemma. Bradley type 134 precision voltage calibrator."
https://www.vintage-radio.net/forum/showthread.php?t=131768 " Bradley 134 Voltage Calibrator"
Look Mum no Computer got one of those too youtube.com/watch?v=0Eo3Kn05SdU&t=683s

[Erik L]

Thanks mrk.

I am on the trail but still no documentation.
Working on it.

Erik