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 Kriesler Miniscope PT1
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 Return to top of page · Post #: 1 · Written at 12:36:41 AM on 28 November 2022.
LegsGT's Gravatar
 Location: Melbourne, VIC
 Member since 19 March 2022
 Member #: 2492
 Postcount: 5

Posting in the old thread on this did not bring it to the top, so I've created this new one in case you can't see the old thread.

Does anyone have the schematic or the full repair manual for these little TVs please?

I've started to fiddle with one I got recently but it only gets 11V, no high voltage, so want to see what's going on.

Thanks


 
 Return to top of page · Post #: 2 · Written at 6:00:10 AM on 28 November 2022.
Brad's avatar
 Administrator
 Location: Naremburn, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 7395

You can change the order in which threads appear in your Control Panel.

https://vintage-radio.com.au/default.asp?f=control-panel


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 3 · Written at 11:57:49 AM on 28 November 2022.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2476

Your email is hidden, mine's not.

Email me and I'll send you a circuit.
It's identical to the PT1, except for CRT type / size.
The 11" is called a 49/1, the 9" is a 49/2.

Check to see if it has the little EHT rectifier valve (DY51) or a selenium diode. These are attached to the EHT transformer.

If it has the little valve, it's an Issue 3 or earlier. Issue 4 has the selenium diode. There is a cardboard tag attached to the chassis that should have the issue number on it.

Make sure you tell me the issue number, so I send you the right stuff. I also have PCB layouts.
There is also a service bulletin that affects those sets regarding the substitution in production of Anodeon transistors. I hope your set is not affected!

Remember my earlier notes about the chassis hinging out. Not obvious but necessary.

These sets were very common and quite reliable, except for the examples afflicted by Anodeon transistors. If you can send me a close-up of the component side of the PCB I will be able to tell you if you have a replacement job ahead of you.


 
 Return to top of page · Post #: 4 · Written at 6:20:06 PM on 28 November 2022.
LegsGT's Gravatar
 Location: Melbourne, VIC
 Member since 19 March 2022
 Member #: 2492
 Postcount: 5

Thanks Brad and Ian.

Ian I just sent you an email thanks.


 
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