diyAudio

diyAudio (https://www.diyaudio.com/forums/index.php)
-   Tubes / Valves (https://www.diyaudio.com/forums/tubes-valves/)
-   -   Dyna-Quik 500 (https://www.diyaudio.com/forums/tubes-valves/207709-dyna-quik-500-a.html)

jdhmeh 28th February 2012 02:51 AM

Dyna-Quik 500
 
Have a Dyna-Quik 500 that hasn't been turned on since 1960. Tesed a few tubes, (I assume are OK, they were new pre-1960), and going thru procedure:
At Short, doesn't show a short
At GM, pegs to the way left of the scale
At Life, pegs to the way left of the scale
At Gas, swings to good, then to replace.

Have done with about 6 tubes, different number, and get same results.

Any suggestions?

HollowState 28th February 2012 03:40 AM

Quote:

Originally Posted by jdhmeh (https://www.diyaudio.com/forums/tubes-valves/207709-dyna-quik-500-a-post2925894.html#post2925894)
Have done with about 6 tubes, different number, and get same results.
Any suggestions?

After sitting dormant for fifty years, you can't just turn it on and expect it to work right. It needs maintenance! Open it up and check for corrosion and dampness. Clean and dry it as needed. Then check the two tubes, 83 & 6AT6. (on a different tester of course) Work them in and out of their sockets to assure good contact. Clean the switches and controls. This is most important.

Inside there are two #44 lamps in a bridge circuit. Make sure they are good and that the sockets for them are clean and making contact. When things are working correctly, both will light dimly and equally.

There are a couple of 50mA rectifiers and a couple of small capacitors that can be checked with an ohmmeter. But you will find that cleaning and tightening connections will be the most effective maintenance. The manual is available on line as a PDF file. I can send it to you if you can't find it.


All times are GMT. The time now is 02:16 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 17.65%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio

Wiki