Guitar Amp Parts For Sale

19Jul/10Off

Bassman Head

I have a 1964 Fender Bassman head and half stack and i don't get any output!?

I have a 1964 Fender Bassman head and half stack that is beautiful, but one day when i was done with band practice i took my amp back up into my room. before practice there was a high pitched whiny noise that got louder when i turned up the volume. so i turned it off and giggled some cords then turned it back on for the practice. it worked the rest of the night. when i took it back up to my room i led it sit for about 3 days. Now when i went to turn it on and play, i dont get any output! when i turn up the volume the speakers hum like there is power going there, but there is no guitar coming out. i tried different cords and stuff like that, but nothing is working! what is wrong and/or what should i do?

Well, I would need to research this more, but, off hand it probably uses vacuum tubes. I thinking it maybe the amplifier tube. A long time ago people actually put a simple schematic inside the box/case. If, you remove the back you may see it. This not a real complicated circuit, and many of the tubes may have the numbers by them.
The link show an amplifier like this. The section on bottom is just for power from the wall. Look up top!
See the 3 round ? Those are your vacuum tubes. Depending how many you have, it be one of those most likely. Testing them is another story. Radio Shack used to be able to do this and may still have the testing equipment, if, someone there knows how to use it. Also, Radio Shack used to sell the tubes, and may still do. If, not you can search on the internet and many HAM radio people may sell them.
If, you know someone with a Multimeter, some do have an Audio input, and you may be able to test across each Tube to see where it losing sound, you start from the output and work left. See the line come out the top of the round, on left that one has a 5 and 70V the center has a 2 and 210V and the third on right where you start is a 2 and goes into your output transformer.
I not sure I can explain the rest, I had an old Meter had a needle, not digital, and could test across those output and see the needle bounce around, not great, but, it let you know something there.
At first you may not get anything and as you work Right to Left, soon you will, Then it the vacuum tube to the right from the working one.
I know this not a good explain, maybe someone can smooth it out better.

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