diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Tubes / Valves (http://www.diyaudio.com/forums/tubes-valves/)
-   -   B&K Tube Tester (http://www.diyaudio.com/forums/tubes-valves/182241-b-k-tube-tester.html)

denny9167 31st January 2011 07:09 PM

B&K Tube Tester
 
I have a B&K 700 tester,I purchased awhile back,and was testing some tubes the other day in the Quick-check section,and noticed that when I press the test 1 button or the test 2,the meter Deflects in the opposite direction,the bottom switch section seems to work OK,does anyone know what might be the problem? I did notice one thing when I opened the unit,one of the #55 bulbs was out,would this have anything to do with the problem?

mctavish 31st January 2011 08:39 PM

Hello, I have a few similar units and I can tell you that those bulbs are ESSENTIAL to the unit functioning properly, they are part of a circuit that automatically adjusts the meter for line voltage fluctuations. Its a good idea to hard wire them in as the push-n-turn bulb holders can have intermittent contact after a while due to corrosion. Its also a really good I idea to replace all of the electrolytics ( especially the one across the meter terminals) for accurate readings. The rectifier tube can be replaced with SS diodes as well. HTH

Captn Dave 31st January 2011 09:08 PM

+1

That is your problem. I always solder the bulb in place. If you don't the unit will not hold calibration.


All times are GMT. The time now is 01:54 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2