Music Electronics Forum - Vintage Amps http://music-electronics-forum.com/ en Mon, 06 Sep 2010 04:12:04 GMT vBulletin 60 http://music-electronics-forum.com/images/misc/rss.png Music Electronics Forum - Vintage Amps http://music-electronics-forum.com/ Vox Cambridge Reverb V3 model 1965 http://music-electronics-forum.com/t21345/ Thu, 02 Sep 2010 01:35:48 GMT I'm trying to restore my amp and the reverb unit is missing a spring and the connecting parts that the hook to. The problem I'm having is identifying what the part number for the unit is so I can replace/repair it. I know it's a type 4. I seen one on the web that was in a Hagstrom amp that looked just like mine and it's part number was 4FB2A1C but that was a transistor amp and they require higher resistance than a tube amp. My unit doesn't have any part number with that format on it. It does have 2 numbers on it, 23-5002-2 and the other is 65443. Does anybody know what the proper part number for the V3 tube model is and if so where I can get parts or replacement for it? ]]> Vintage Amps guyfergy http://music-electronics-forum.com/t21345/ Check out this tremelo circuit http://music-electronics-forum.com/t21279/ Fri, 27 Aug 2010 17:55:27 GMT Got a Valco-Supro amp on the bench, came in for a non-functioning tremelo, I found a failed resistor in the circuit (one of the leads broke). I... Got a Valco-Supro amp on the bench, came in for a non-functioning tremelo, I found a failed resistor in the circuit (one of the leads broke). I couldn't find a schematic anywhere for it so I traced it out and drew one up myself.

This is a bit different than the typical Fender circuits I'm used to seeing, either the roach circuit on the bigger BF/SF amps, or the bias wiggle as in the Princeton Reverb, or the brown face trem circuits as in the 6G12 Concert. This circuit uses a single triode that ties to the cathode of the input gain stage. The trem action is very nice, but without an intensity control it's a little much. The range of speed control is good though, allowing a nice slow tremelo action up to faster than I'd typically use.

Anyway, just thought I'd share it here. If you could add an intensity control to it it would make a nice way to add tremelo to a cathode bias build, using only one triode to get there.
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]]> Vintage Amps hasserl http://music-electronics-forum.com/t21279/ Ampeg Echo Twin ET-1. speaker driven reverb? http://music-electronics-forum.com/t21231/ Mon, 23 Aug 2010 23:19:06 GMT I am looking at trading some things to get a 60's ampeg echo twin ET-1 with the 6v6 and tube rectifiers. I understand there are a couple different makes with different tubes.


I have read somewhere that this amp doesn't use tube driven reverb like the other amps I've played. Some one said it uses speaker driven reverb...

what is that? I looked it up but couldn't find anything. Hopefully it is not the same as capacitor driven reverb as I understand that sounds pretty bad.

I tried the amp out and I can't seem to get the reverb to kick in. If I hit the pan I get some reverby sounds like you would expect, but I can't get the guitar to drive the pan at all. If I do end up buying it, I will take the amp out, measure the ohmage, and check the connections.

Is it possible it's just a tube that is not allowing the input to drive the reverb tank?

and has anyone had experience with this amp?


thanks in advance. ]]> Vintage Amps Bmxbarspin724 http://music-electronics-forum.com/t21231/ 1966 fender twin http://music-electronics-forum.com/t21200/ Sat, 21 Aug 2010 12:07:02 GMT hello I recently put my old black face back in service but it came back from the shop twice now with a persisting problem the normal channel... hello
I recently put my old black face back in service
but it came back from the shop twice now with a persisting problem
the normal channel sounds like a dream!~~~
but the vibrato channel has a terrible scratchy distortion especially when the the low A string is struck
this noise will bleed over to the normal channel if the vibrato channel volume is up past 4
any help would be most appreciated
thanks
cp ]]> Vintage Amps chris61 http://music-electronics-forum.com/t21200/ I need some help identifying the make of this amp. http://music-electronics-forum.com/t21137/ Mon, 16 Aug 2010 19:06:29 GMT Hello all, I am hoping the far flung readership of this forum can help me in identifying my latest purchase. There are no badges or brand names... Hello all, I am hoping the far flung readership of this forum can help me in identifying my latest purchase. There are no badges or brand names anywhere on this that I can find.
It looks somewhat like a Gretsch, however, all the Gretsches I have seen wrap around to the right, and this is a leftie.
It has three controls; Micro (+on/off) , Volume and Bass. It has one 1/4" jack and four odd small ones that you can see on the right of the control panel. I have no idea what kind of plug fits into them.
The tubes are 12AT7, 6005, and 6X4. It also has a working light bulb inside the chassis that serves no obvious purpose.
The power transformer is marked PT-65-A, and it has a 8" Westwell 4 ohm speaker that looks original.
The back is secured by two screws at the top of the panel and two that come up through the base of the amp. Again, all this looks original.
It needs new knobs and an electrolytic cap change, as well as a three prong plug, but otherwise, I put in a new JAN6005 and it works beautifully and sounds really good. Some slight hum but I will take care of that.
If anyone can help me find out what make this is, I would be appreciative.
Here are some pics.
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]]> Vintage Amps Resonator Guy http://music-electronics-forum.com/t21137/