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OK ... Good News: It's working now. Bad News: Not sure why? - Cable options and working with the output jacks didn't help. - But then I played around with the knobs in the back Presence and Effects Loop knobs and it broke loose. Now maybe I jiggled a output cable somehow or something...

When I plug either cabinet/cable into the 8 ohm output they both work. So both the speakers and the cables seem OK. I was just using the pair of 4 ohm outputs last week (before I did the filter caps) with both speakers/cables and they did fine. So I'll clean the outputs just to make sure. I...

8 ohm (yellow to ground) = 1.1 ohm 4 ohm (green to ground) = .6 ohm (green to yellow) = .6 ohm That sounds like my transformer is working and connected doesn't it? I measured these by plugging in a cord and measuring the center and ground connections ... so I think the jacks are working...

When I check the resistanc between GREEN-to-GROUND and YELLOW-to-GROUND ... what value am I looking for? I think the jack is OK ... both 4 ohm jacks do exactly the same thing. The yellow wire that goes from the 4 ohm jacks back to the circuit board ... what does that do?

OK I checked the connections ... rock solid. Is there a chance that the transformer that feeds the output jacks could be failing. I notice there are 3 leads to the transformer. I had just used the 4 ohm jacks right before I did the filter caps work. BLACK - To Ground YELLOW - to 8ohm jack...

My mistake ... thanks

Sorry ... double post remove ... unrelated.

I just did some work changing the filter caps on the '78 mesa/boogie and the 8 ohm output that I usually use is working fine. But neither 4 ohm speaker output is working ... and they were before I did the work. I can hear sound but it is really low ... same for both outputs (used individually...

I think it only counts one play ... maybe it uses IP addresses ... so 3X a day is just 1X I think you get another vote if you select HOT and it takes away the 1 count if you select FLOP

http://www.youtube.com/watch?v=lkCSw-KDVjQ Now what do you do? :roll:

I just retubed at the end of last year. Although, I can say that I left the V2 (ECC83) and V3 (12AT7) tubes in the amp ... they sounded better than the new ones I bought ... even though they are the originals from '78. I A/B them one at a time and there was no question which one sounded better...

That matches my experience with 30 year old caps ... I have played it almost every day. But I think I had lost a bit of preformance from the caps over time and just got it back. I think the components I put in are as good as the ones I took out too.

Great ... Even if they last this long, I wonder why guys would not want the improvement in the sound. It's better ... I'd have done it just for that if I'd of known sooner. Thanks once again for the help ... :D

Sounding really good after a week of playing ... really satisified. Even though I picked up on the filter caps due to the occasional volume loss, the change in sound was pretty gradual. I was clueless to the filter cap issue. So I still have the same question: Other than tubes and filter...

Thanks to all ... Now that I've successfully changed the fetron ... the power tubes (pre-amp tubes are checked and OK) ... and the filter caps: Is there anything else that the owner of a 30 year old boogie amp needs to check? :roll:

Yeah ... there's some great technical knowledge here ... Boogiebabies, Stokes and many others. I've been able to make some adjustments to keep my Boogie solid. To be honest, I didn't even know there were parts other than tubes that needed to be changed!

New caps arrived yesterday ... new filter caps are now in the Boogie ... Sounds good ... maybe a little "tighter"? :D

I would agree ... good parts ... better than most ... mine has lasted 29 years and never been in the shop. I do think I'm having trouble (loses volume occasionally for no reason) that may be related to the filter caps. At first I retubed ...still happens. You can see the pictures of caps...

I'm just thankful that I visit this board and determined I needed new ones. For me good advice. My amp was losing volume yesterday ... it does this rarely. I decided to leave it unplugged until the new parts got here in a few days. Can you imagine how I'd feel if it popped a cap the day...

by the way, replacements for my caps (picture #1) will be here Thursday. :D