timv
Well-known member
I did some searching and only came up with 2 explanations and they are both different. How is the reverb mod done? Heres the 2 descriptions I found:
There are several mods to boost the reverb in the MK III. The easiest one is to place a 3.3K 1/2 watt resistor in series with the black wire at the effects return jack. This will boost the amount of reverb available. It will not change the tone of it. There is another more extensive mod that boosts the amount and can change the tone of the reverb. You should contact Mike B. at Boogie for that one.
You will have to unsolder the black wire from the efx rtn jack, solder the resistor to where the wire was and then solder the wire to the other side of the resistor. Like this:
[efx rtn jack]--black wire--- stock
[ efx rtn jack ]--3.3K resistor--black wire------- mod
Just as a follow-up to my earlier post- Having recieved no reply from Mesa Boogie (remember I live in Australia and have to rely on their email service) I spent several hours trawling the net and eventually came across a posting in a user group almost a decade old. This included the official Mesa fix for the mark III reverb glitch and it is very simple- a 120K resistor soldered between the red lead of the reverb transformer (5 leads of varying colours come out) and ground (I soldered to the earth lug of the reverb send RCA jack-the one with the black wire soldered to it). Total time- 10 minutes including removing and replacing the chassis. Total cost 15 cents
Are one of these right or both? I may be looking at toadmeister's amp for him and he expressed interest in having the reverb mod done, wants a bit more reverb out of it. I'll probably do the R2 mod also but already know that one.
Thanks for any help. I'll take pictures while I do it to share.
There are several mods to boost the reverb in the MK III. The easiest one is to place a 3.3K 1/2 watt resistor in series with the black wire at the effects return jack. This will boost the amount of reverb available. It will not change the tone of it. There is another more extensive mod that boosts the amount and can change the tone of the reverb. You should contact Mike B. at Boogie for that one.
You will have to unsolder the black wire from the efx rtn jack, solder the resistor to where the wire was and then solder the wire to the other side of the resistor. Like this:
[efx rtn jack]--black wire--- stock
[ efx rtn jack ]--3.3K resistor--black wire------- mod
Just as a follow-up to my earlier post- Having recieved no reply from Mesa Boogie (remember I live in Australia and have to rely on their email service) I spent several hours trawling the net and eventually came across a posting in a user group almost a decade old. This included the official Mesa fix for the mark III reverb glitch and it is very simple- a 120K resistor soldered between the red lead of the reverb transformer (5 leads of varying colours come out) and ground (I soldered to the earth lug of the reverb send RCA jack-the one with the black wire soldered to it). Total time- 10 minutes including removing and replacing the chassis. Total cost 15 cents
Are one of these right or both? I may be looking at toadmeister's amp for him and he expressed interest in having the reverb mod done, wants a bit more reverb out of it. I'll probably do the R2 mod also but already know that one.
Thanks for any help. I'll take pictures while I do it to share.