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Marshall vs265 65w valvestate amp reverb not working

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  • phreak1118 Oct 31, 2008

    I am guessing it is the reverb tank. I dont know if my tank is original. What is the model number on your reverb tank? Mine is 8db2c1d.

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SOURCE: Marshall Valvestate 8100 Head volume

I believe that your model uses a 12AX7 tube for the pre-amp section. The tube is bad and needs to be replaced. Start there.

Dan

Posted on Oct 21, 2008

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Wot are the send,return,post out socket for on a prosound 4100 amp


These are all related to using external effects processors, like if you wanted to use a separate reverb unit.
"Send" is the output that gives the un-processed signal to the external device, and "return" receives the signal from the external device.
"Post Out" is an output from the amp that occurs AFTER the send/return jacks on the bus, i.e., if you are using an external reverb unit, the "Post Out" signal will include the reverb fx. If you have a "Pre Out" jack, it's signal will NOT include the reverb fx.

May 08, 2011 | Audio & Video Receivers

1 Answer

I got this old Reverb Amp from cleaning out a house for a real estate agent. I was wondering its worth & how to go about getting it to someone who would like to have it. Thank You Its a Pioneer SR-202...


It's an old 'spring-type' reverb.

http://en.wikipedia.org/wiki/Reverberation#Spring_reverberators

I have one from the mid-70's, long unused. Digital reverb is more predictable and not susceptible to rom vibrations or jarring. There are those who would still want one.

You might put it out on eBay. They don't get much for them.

This auction expires in 2 days. The bidding is $20.50 right now. You might watch it to see what the unit eventually goes for.

http://cgi.ebay.com/Vintage-Pioneer-Reverb-Unit-SR-202w-/260777273468?pt=Vintage_Electronics_R2&hash=item3cb789687c

May 05, 2011 | Audio & Video Receivers

1 Answer

Hi, I've a Marshall JVM410H which is connected to a Marshall 1960B cabinet. The problem is I can't take the volume up very much because there is so much distortion - the more I turn the volume up, the...


Hi-
It sounds like you have the same rig I do. I bought the JVM410h immediately after it came out. I'm a professional gigging musician, and it had the versatility I needed.
One of the first things I noticed was it's high gain structure. On my JCM800, I could crank the gain to 10, and get a great, "classic Marshall" overdrive tone. The gain structure of the JVM is more sensitive. I find myself not needing the gain knob any higher than 10 o'clock, in the RED modes of the OD channels.
The manual is very informative, though somewhat complex. I recommend watching this tutorial on it:
http://www.marshallamps.com/product.asp?productCode=JVM410H#
Click on the "THEATRE" link on the right.
I love my amp, but it's been in the shop twice already. Marshall's are known for being unreliable, and this is amp is in no way an exception. Be gentle with it! It's moody.
Best of luck, and I hope this helps!

Aug 25, 2010 | Audio & Video Receivers

1 Answer

Humming noise when amp is switched on, nothing pluged in, make - marshall g30r cd


(Maybe) Seems like a problem with the reverb.Try opening it up (while un-plugged.) and try cleaning it out and checking there isn't any loose conections.

Nov 22, 2008 | Audio & Video Receivers

1 Answer

HELLO, just bought a fender HRD 410 AMP AND DISCOVERED THAT THE REVERB DOES NOT FUNCTION ! WHAT'S UP ?


Hi Fenderman.

Damn, you gotta hate that. First thing, do you have any recourse with the outfit you just bought the amp from? I guess not if you are asking in here. There is not a whole lot that stops the reverb in these amps. First things to check would be that the connections to the rev-eb tank are ok, and the cables to them not damages, and the terminations to the RCA plugs are good. Check that the reverb tank is connected thew right way round also. If everything so far checks out, and yourself, or an electronics savvy mate then time to download the circuit from here

Then from there, pull the chassis out of the box, and check/look for dry/cracked solder joints about the reverb Pot, I would check the voltages about U2, TL072, and even just change it out if you are unsure. The reverb tank could also be down, hard to check this easily without swapping it out, if you have(maybe time for the repair shop here) a CRO, then you can sniff off the audio going in and out of the tank to be sure that is it functioning.

Anyway, that is a rundown on what may be wrong with the HRD. If you have any questions, more that happy to answer them and continue to help you out. a FixYa rating is a great reward for my time to talk this through with you. Cheers!

regards
robotek

Nov 10, 2008 | Audio & Video Receivers

1 Answer

Marshall valvestate 40 guitar combo, clean channel works fine, dirty channel has no o/p have changed valve ecc83, channel indicator led comes on and valve lights up but still no o/p. Can you help...


Hi Andy

The problem you face is most probably the same that stops most all valve state amps from working. They suffer terribly from fry/cracked solder joints. You will have to remove the main circuit board from the chassis, and resolder any suspect joints you can see, particularly about the rear loop in out jacks, control pots on the front panel, and power supply. There is a large power resistor and zener diode that cause problems in this model from memory. The valve never fails in these amps. Due to the lower supply voltages they are run at, they are not under alot of pressure, and as such give good reliable service. Go over the amp for dry joints first, and see how you get on. I have repaired so many of these with that problem.

regards
robotek

Nov 07, 2008 | Audio & Video Receivers

1 Answer

The footswitch for bugera 6262 valve amp seems to have a logic problem. The clean channel leaves 'lead and reverb' leds lit on footswitch, pressing 'lead' lights the crunch channel on the amp... and reverb...


Hi ! Check and make shure that the cord conections between the pc board on the backplate of the amp to the logic board are firmly pushed in there slots.
Good luck , Stefan from Sweden

Aug 18, 2008 | Audio & Video Receivers

1 Answer

I have a Fender tube amp The Twinn. 4 6l6 2 12at7 and 4 12ax7. Mu reverb is dead and I here some strange oscillation. I suspect the 12at7 in reverb and one 12ax7 Both microphonic and very dem fil. ...


Hi ohmytom

Yes, they could be causing the problem.The filaments are a little hard to see sometimes, you will always get a little microphonic activity about preamp tubes. It may also have failing capacitors depending on how old it is. Is it a "Twin Reverb". Let me know the exact model and we can be a little more specific of the problem and solution. Cheers


regards
robotek

Jul 14, 2008 | Audio & Video Receivers

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