Author Topic: Pulsetek/Bradley electronics 233  (Read 974 times)

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Offline alan.bainTopic starter

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Pulsetek/Bradley electronics 233
« on: September 24, 2022, 09:30:22 am »
Does anyone know anything about this pulse generator? I have one which had recently died and am without a diagram or any info and a websearch found nothing. It looks very straightforward repairwise with some information. Construction is almost totally based on MC10101 quad OR/NOR gates in ECL, I was simply using it to trigger a tunnel diode fast rise pulse generator for testing amplifiers and active probes.

I've had no joy locating any manuals online or for sale. The only Bradley/Pulsetek products for which I can find information are various calibrators.

 

Offline alm

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Re: Pulsetek/Bradley electronics 233
« Reply #1 on: September 25, 2022, 02:18:04 am »
I don't have any information on this model, but I just happened to come across this eBay listing for a different Bradley pulse generator. I have no idea if they share any similarity, but just in case it might help you.

Or maybe it's a tube-based generator that's decades older...
« Last Edit: September 25, 2022, 09:03:50 am by alm »
 

Offline alan.bainTopic starter

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Re: Pulsetek/Bradley electronics 233
« Reply #2 on: September 25, 2022, 11:58:50 am »
Yes I saw that, but I have no idea what a 176 looks like, I did hunt around for a picture to see if it might be similar (or a previous generation) but so far nothing!
 

Offline alm

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Re: Pulsetek/Bradley electronics 233
« Reply #3 on: September 25, 2022, 12:39:10 pm »
Searching Google Books for Bradley 176 gave me some hits in old magazines. No pictures, but i got snippets of ads of the 176 from 1971, 1972 (176B) and 1973 (176B):
Quote from: 1971: Television and Short-wave World - Volume 43
A Modular Pulse Generator The two modules on the left form complete square wave generator giving outputs up to 6V into ... The Bradley 176 provides an almost limitless variety of complex pulse patterns All Bradley instruments can be ...
Quote from: 1972: Canadian Electronics Engineering - Volume 16 - Page 48
Do You Want a Pulse Generator with a basic 2 nano Sec rise time ? 1Hz - 50 MHz P.R.F. ? 5 nano Secs to 5 Secs independent variable rise and fall times ? 10 nano Secs to 1 sec delay / width control ? The G & E Bradley type 176B has all ...
Quote from: 1973: Electronic Engineering - Volume 45, Issue 1
The Bradley 176B provides an almost limitless variety of complex pulse patterns . For example , the two modules on the left form a complete square wave generator for outputs over the range 1 Hz to 50MHz . The four on the right form a ...

Online factory

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Re: Pulsetek/Bradley electronics 233
« Reply #4 on: September 25, 2022, 01:03:22 pm »
Telford Electronics have a operator/service manual under "Pulsetek Type 233", best to check it is the same unit before ordering one though.

https://www.telford-electronics.co.uk/manual.php?alpha=p



David
 

Offline alan.bainTopic starter

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Re: Pulsetek/Bradley electronics 233
« Reply #5 on: September 25, 2022, 04:06:15 pm »
Thanks - I have dropped them a line!
 

Offline alan.bainTopic starter

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Re: Pulsetek/Bradley electronics 233
« Reply #6 on: September 27, 2022, 05:17:48 pm »
Just to say thanks to David above for the pointer. Telford Electronics have the schematics I need and they should be on their way!
 

Offline alm

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Re: Pulsetek/Bradley electronics 233
« Reply #7 on: September 27, 2022, 05:32:40 pm »
Great! How much did you pay, if you don't mind sharing? Did they have a complete manual or just the schematics?

Offline alan.bainTopic starter

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Re: Pulsetek/Bradley electronics 233
« Reply #8 on: October 04, 2022, 07:53:49 pm »
I now have schematics only. They were very confusing until I realised that the schematics use the "D" symbol to denote an OR or Do to denote a NOR gate!

Alan 
 


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