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Troubleshooting Problem in Tube Preamp
Troubleshooting Problem in Tube Preamp
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Old 13th February 2003, 09:19 PM   #1
Audiofng is offline Audiofng
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Unhappy Troubleshooting Problem in Tube Preamp

Please help try to solve my problem. I just purchased a Dynaco PAS2 Preamp and it worked fine untill one of the tubes seemed to blow, (it was only glowing half as bright as the rest). I replaced it and still have the problem. The problem is I only have half output on the right channel and full output on the left channel. If I use the tape output then I have full output on both channels.

Any suggestions pleassssse.

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Old 13th February 2003, 09:30 PM   #2
SY is offline SY  United States
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Troubleshooting Problem in Tube Preamp
Measure the DC voltages on the line amp tube from the suspect channel. Post your results and I'll bet we'll all have some good ideas.
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Old 13th February 2003, 11:04 PM   #3
Audiofng is offline Audiofng
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All dc voltages are correct as per the owner's manual. Starting to suspect the RCA connectors. Going to replace them tomorrow. I will let you know. Thanks

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Old 13th February 2003, 11:12 PM   #4
fdegrove is offline fdegrove  Europe
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Default AH....

Hi,

You could be right there...tubes rarely ever die just like that.
Also check for a faulty contact on the selector switch.

If you don't have a copy yet,a manaul for the Pass-2 can be downloaded from:

UNCLE NED.

Keep us posted,
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