FDP Forum / Bassman intermittent static only on both Normal input jacks/ 7 messages in thread.
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| cisco Contributing Member **** Tucson, Arizona USA Bottom Sucker |
This was a Weber 5F6A kit and I bought it used several years ago and it slowly developed this issue. This has been driving me crazy and I love the tone of this amp which is the upgraded model with Mercury Magnetics and Weber 10A125 speakers. The intermittent static can be heard when hitting a chord or just the low E string. I have re-soldered all connections from the Normal input jacks to the V1 tube. I even replaced the caps C1, C4 and C5 just for grins. I have replaced the tube in V1 multiple times with no improvement and even cleaned the pins with a non residue contact cleaner and used toothpicks. The tube sockets are porcelain and impossible to get inside and adjust the tension which seems very tight still.<br /> <br /> If I plug into the bright input jacks it sounds perfect all the time. Your suggestions please. |
| cisco Contributing Member **** Tucson, Arizona USA Bottom Sucker |
I forgot to mention that moving the volume pot for the normal channel does not cause any static noise. |
| Prairie Dawg Windsor Heights IA What's love got to do with it? |
Seeing as the trouble is only in one channel that more or less localizes it to a relatively small part of the circuit. Start from one end and work your way to the other.<br /> <br /> Did you by chance use carbon comp resistors when you built it? That could be a source of noise. |
| cisco Contributing Member **** Tucson, Arizona USA Bottom Sucker |
The Weber kits use metal film resistors with long leads for fiber eyelet boards. I'll order some more 1M, 68K, and 100K resistors and replace one at a time. The resistors are all that's left to replace. Probably order a 50KL bias pot too. Thanks for your input. <br /> <br /> Any other input is highly appreciated. |
| JBLTWIN1 usa you want me to play where? |
Since it's JUST those jacks, I assume you HAVE considered just replacing te jacks or cleaning the corrosion from them |
| Prairie Dawg Windsor Heights IA What's love got to do with it? |
@JBLTwin you're right. Have heard Weber OEM jacks are not the best. |
| cisco Contributing Member **** Tucson, Arizona USA Bottom Sucker |
The jacks are Neutrik and I ordered two more plus a couple each of the 1M, 68K and 100K metal film resistors, Plus I added in a 50K bias pot. If replacing the two jacks cures the problem then CJ at Weber said he would refund the cost of the jacks. |
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