Have all the parts now on hand to hopefully restore the HV on the Type 561B.
![](https://imagizer.imageshack.com/v2/xq90/923/Hj8xw3.jpg)
The TO-66 transistor is Q219 which I carelessly blew up trying to check the oscillator waveform. I also ordered Q214 just in case I fried that one too. That's in the envelope on the left. I'll check to old one and if good this will be a spare. And I have plenty of 125ma fuses.
D221 is the HV rectifier that was replaced in the past and is clearly the wrong P/N and as Dragon suggested might actually be for a microwave oven. I found an original part at Talon Electronics in Virginia so I didn't have to order it from Qservice in Greece and wait forever for delivery.
I'm hopeful that replacing that HV rectifier I'll restore the HV from -1.6KV to -3.3KV and I won't have to pull out the entire assembly and check all the resistors. But if not I'll do what I gotta do. Tomorrow's project is get all these new parts installed and fire it up.
![](https://imagizer.imageshack.com/v2/xq90/924/tbPO2V.jpg)
![](https://imagizer.imageshack.com/v2/xq90/923/bBydz9.jpg)
In the meantime must keep the other stuff in tip-top shape.
The 8505A: 9.99691V vs 9.99694V
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif)
The Type 535A: 50Khz and 0.5V p-p
And finally, The Type 106 Square Wave Generator should be here Tuesday.
![](https://imagizer.imageshack.com/v2/xq90/924/Dw4M1I.jpg)