Search found 3013 matches
- Fri May 03, 2024 4:22 pm
- Forum: Fender Discussion
- Topic: Conductive boards again.
- Replies: 19
- Views: 1204
Re: Conductive boards again.
I never seen a Fender with these lugs before either but it is what it is. The lugs are original as the resistor attached to the lugs is the very same type as is used on the other side of the P.I. grid. There are no signs of the resistor being removed and resoldered. The solder joints are untouched a...
- Fri May 03, 2024 3:19 am
- Forum: Fender Discussion
- Topic: Conductive boards again.
- Replies: 19
- Views: 1204
Re: Conductive boards again.
Purely for interest sake here is a picture of tagstrip being used to eliminate problems with a conductive board at the Fender factory.
They knew about the problem in the silver face amp days.
They knew about the problem in the silver face amp days.
- Fri May 03, 2024 2:35 am
- Forum: Fender Discussion
- Topic: Conductive boards again.
- Replies: 19
- Views: 1204
Conductive boards again.
I have a silver face Twin on the bench and I have never seen a board like it. The board is stuffed.
When I got the amp the power transformer was stuffed, I noticed that the tone control caps are soldered on one side
When I got the amp the power transformer was stuffed, I noticed that the tone control caps are soldered on one side
- Sun Apr 28, 2024 6:13 am
- Forum: Technical Discussion
- Topic: Illinois brand capacitors still bad?
- Replies: 44
- Views: 2039
Re: Illinois brand capacitors still bad?
Oddly enough I had a friend get a Fender Blues Junior come in. It was built in 2019 and is a Mark 2 amp which uses cathode bias. The filter caps were the blues IC and they looked fine, no signs of spilling their guts.
- Thu Apr 25, 2024 2:31 pm
- Forum: Trainwreck Discussion
- Topic: Why did it take me 15 years to try a 12ay7 in my Liverpool?
- Replies: 8
- Views: 1912
Re: Why did it take me 15 years to try a 12ay7 in my Liverpool?
In the diagram the switch is set to fast ( higher gain) mode.
https://ampgarage.com/forum/files/Expre ... iation.jpg
https://ampgarage.com/forum/files/Expre ... iation.jpg
- Sun Apr 21, 2024 3:26 am
- Forum: Technical Discussion
- Topic: Illinois brand capacitors still bad?
- Replies: 44
- Views: 2039
Re: Illinois brand capacitors still bad?
What makes you think the problem is exclusive to the Hot Rod series Fender amps? Something I recall reading about some time ago. May be just internet lore, but maybe Fender did end up with the bulk of the bad product from that era. Yeah, it’s hard know if they are still bad. I would rather have mor...
- Sat Apr 20, 2024 1:39 pm
- Forum: Trainwreck Discussion
- Topic: Help me Rocket Men
- Replies: 8
- Views: 1037
Re: Help me Rocket Men
The output transformer is quite an old version. It has a 5.5K primary from memory and it is quite loud. I remember RJ’s was quite full on. I thought it was in the vein of Richie Hall’s amp. https://youtu.be/HHiJrufUbF0?feature=shared https://ampgarage.com/forum/viewtopic.php?t=30033 https://cdn.shop...
- Sat Apr 20, 2024 1:11 pm
- Forum: Technical Discussion
- Topic: Illinois brand capacitors still bad?
- Replies: 44
- Views: 2039
- Sat Apr 20, 2024 1:09 pm
- Forum: Technical Discussion
- Topic: Illinois brand capacitors still bad?
- Replies: 44
- Views: 2039
Re: Illinois brand capacitors still bad?
This problem was specific to Fender amps manufactured over some range of dates, and limited to IC electrolytics sold to Fender, IIRC. Great to hear from you as always Martin. I appreciate your input. I must admit that I don’t know if the bad IC brand caps were limited to Fender. Perhaps if there wa...
- Fri Apr 19, 2024 8:59 am
- Forum: Trainwreck Discussion
- Topic: Help me Rocket Men
- Replies: 8
- Views: 1037
Re: Help me Rocket Men
I think that will be your biggest challenge finding the right parts. The parts of greatest concern are the transformers. I would build it on a Garolite board, phenolic boards can be conductive and you don’t need that. https://modulusamplification.com/wrocket-top-boost-30watt---4-x-el84-head-kit-3229...
- Fri Apr 19, 2024 6:09 am
- Forum: Technical Discussion
- Topic: Illinois brand capacitors still bad?
- Replies: 44
- Views: 2039
Illinois brand capacitors still bad?
In the past I’ve seen quite a few fender amps with IC branded capacitors which are leaking, I dare say quite a techs made a good living replacing capacitors from Fender amps.
Have IC caps turned a corner and become reliable or do they still leak?
Have IC caps turned a corner and become reliable or do they still leak?
- Mon Apr 15, 2024 2:48 pm
- Forum: Technical Discussion
- Topic: Yet Another Two Stroke build
- Replies: 32
- Views: 1946
Re: Yet Another Two Stroke build
I probably would look for something like this Hammond output transformer. https://www.hammfg.com/part/1628SEA If you disagree that’s fine, but I would like to know why. It is touted as a Hi Fi transformer, but I don’t like Class A amp with rubbish bass response generally. From my experience this tra...
- Mon Apr 15, 2024 5:30 am
- Forum: Technical Discussion
- Topic: Measuring filter caps performance.
- Replies: 4
- Views: 491
Re: Measuring filter caps performance.
Measure the leakage at rated DCV. Measure the ESR. Measure the capacitance. Look for deformities. Fairly simple, but it takes time. It can be done by lifting one leg with care, and can be done using the amp's power supply when you have a variac and use a series resistor for current sensing. Right, ...
- Mon Apr 15, 2024 2:31 am
- Forum: Technical Discussion
- Topic: Yet Another Two Stroke build
- Replies: 32
- Views: 1946
Re: Yet Another Two Stroke build
]The Two Stroke seems a strange amp to me. The tone control on these amps is nice but it does mean the amp loses signal so it doesn’t have the same break up as a Champ. I don’t know why the second 1.5K cathode resistor wasn’t bypassed by a 5uF to 22uF cap for extra gain and a 47 ohm tail resistor pu...
- Mon Apr 15, 2024 2:14 am
- Forum: Technical Discussion
- Topic: Measuring filter caps performance.
- Replies: 4
- Views: 491
Measuring filter caps performance.
It’s not a question I thought I would be asking but here I am. I use the ESR-70 to determine the condition of the filter caps. I have mentioned this online and been roundly told this tester won’t determine if the cap is leaky and I should simply replace the caps. I tend to think if the cap was leaky...