Nothing is forever, and, I used to enjoy this group more in the past, myself.Though I am no fan of Facebook, I do enjoy our "Old Tekscopes" group, there.The visual interface is a nice alternative and

If it aint broke don't fix it!!!Running several 561As & 565 in original condition with NO issues.That is the norm for 500 series gear.Bernie Schroder

Its been a few years since I worked on a 555 so my memory is spotty. The -150 rail is the one all others reference - it must be spot-on and NOT sag under full load with low line voltage; see service m

Finding a used one would be the best shot. NOS is probably a pipe dream. Be sure you know the HV oscillators are happy before you go there. What are you seeing? Bernd Schroder

They are not, but they will get 'used up' with many hours of use. If you have to increase intensity much past 12 o'clock you're crt may be getting tired. Next symptom is 'double peaking'. You can find

Thx.

Matt; Have found a standard 'short' interconnect. No part numbers so I need to verify this is for 555, not 551. Possible Tek only built one cable for both...just not sure. Let me know if I should dig

I may have a cable - not thrilled at parting with it but do not want to see a 555 butchered... Will have to go dig. The connectors are worth crazy money and I have not found a better HV interconnect.

I may be able to help

Shame when that happens; a full complement of tubes is not cheap to source and full calibration will be necessary. Also, the 565 can be prone to crt heater isolation breakdown and HV transformer issue

Sebastian; I've been wanting the same for use with Dennis' board. Plenty of 500 mainframes and plug-in frames, but also 'low on resources'. Bernd Schroder

D U H where to start... NOBODY is talking about moving the forum you don't want to be on facebook? DON'T ! THE END. kindergardeners

well, you had time for this pointless remark

start making sense - the only thing 'diluted' is this post

...and more eexposure for the 'hobby'. Thank you.

lets mind out own business

I have just been added as 2nd admin of the new Facebook page "Old Tek Scopes". Link: https://www.facebook.com/groups/oldtekscopes/ Have posted link to this group, there. Everyone is welcome. Thanks. B

Walter; Have two AVC-20s and a manual, I think. Problem is that the unit requires "NTSC blackburst", or "Genlock" from a video generator to lock to. Don't remember much more. I went with Tek 760s, ins

what if I had one in norcal? what do you want this for?

Sam; Would you mind emailing links to me at Tubesnthings@...? Thx in advance. Bernd