Rich Mod PPIMV - Help

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Greazygeo":3md7h5b7 said:
Vrad":3md7h5b7 said:
Greazygeo":3md7h5b7 said:
Vrad":3md7h5b7 said:
And just to make things even more interesting... there's also the Lar-Mar PPIMV. Haven't tried that one, but folks seem to love it.
They all stink. You can only go down about 1/4th before the tone starts getting messed up.

Yes Im bored. :)

No... you're absolutely right...
I had to pair my Rich Mod with a Hotplate.
I just had a guy bring me a metro amp he was trying to put in one of these masters. Told me it worked for a few minutes then quit. I don't see how it could have ever worked, he didnt have it wired right, not a big deal easy to get this stuff mixed up. He did a great job on the layout, soldering and such. Just think he looked at it too hard probably.

Anyway, playing it reminded me how much I hate these masters! :)

Hee hee... The sweet spot is about 1/2 way up. Which is too damn loud for my purposes...
 
jerrydyer":3ps02dx4 said:
they both work great the one with the 2.2 meg res has a safety feature..
Jerry, I'm not sure how to apply your diagram to my circuit board? Do I have to remove my 220K resistors? And, what do I do with the .022uf caps? Thanks for your help.
 
Greazygeo":wyuoo7te said:
Vrad":wyuoo7te said:
And just to make things even more interesting... there's also the Lar-Mar PPIMV. Haven't tried that one, but folks seem to love it.
They all stink. You can only go down about 1/4th before the tone starts getting messed up.

Yes Im bored. :)
They work just fine for bar gigs. I've been using them for 30+ years. I might not use one to record, but at band volume they're fine.
 
what you can do in case you want to put it back stock
snip the 220ks at the opposite end from where they come together and pull them up a little . snip the green and orange wires and strip a new peice of exposed wire. now you have brokent the connection between the .022 caps and the 5.6k res on its way to the power tubes.

run a wire from where the orange wire sed to be to the input of one of the 220k pots. do the same for the green . the putputs go back to the orange and green. run the ground of the 220k dual pot back to the junction of the two 220k res's.. you should use a peice of sheilded wire there and kill two birds with one stone. If you use the diagram I posted its easy to do.
 
Greazygeo":1om0easb said:
Vrad":1om0easb said:
And just to make things even more interesting... there's also the Lar-Mar PPIMV. Haven't tried that one, but folks seem to love it.
They all stink. You can only go down about 1/4th before the tone starts getting messed up.

Yes Im bored. :)
Bullshit. That is all...

Steve
 
Vrad":1lg3qvle said:
And just to make things even more interesting... there's also the Lar-Mar PPIMV. Haven't tried that one, but folks seem to love it.
The diagram that Jerry posted IS the LarMar. To me, it sounds best...

Steve
 
I did that easier one way back to a home made plexi follwing the hoffman schematic. I also added the cascaded gain stage. It sounded really really good with that amp. Lower voltage 79 PT, it was a 1987 to a T but with the extra gain stage 2.7k .68 cap and only one 470k between. really good sound and sustain. very VH ish.. tapping was really easy. it had that certain extra sizzle like the power utbes really adding to it but total control ..
 
jerrydyer":7j14tf2t said:
I did that easier one way back to a home made plexi follwing the hoffman schematic. I also added the cascaded gain stage. It sounded really really good with that amp. Lower voltage 79 PT, it was a 1987 to a T but with the extra gain stage 2.7k .68 cap and only one 470k between. really good sound and sustain. very VH ish.. tapping was really easy. it had that certain extra sizzle like the power utbes really adding to it but total control ..
Very useful info, Jerry. Thanks for your input.
 
Greazygeo":3rdhmysd said:
I just had a guy bring me a metro amp he was trying to put in one of these masters. Told me it worked for a few minutes then quit. I don't see how it could have ever worked, he didnt have it wired right, not a big deal easy to get this stuff mixed up. He did a great job on the layout, soldering and such. Just think he looked at it too hard probably.

Anyway, playing it reminded me how much I hate these masters! :)
Thanks for your unsolicited and totally useless opinion...you're free to go now.
 
they dont sound good in 2 gain stagers. you need at least three.
 
bds9487":2s6fuqp9 said:
Greazygeo":2s6fuqp9 said:
I just had a guy bring me a metro amp he was trying to put in one of these masters. Told me it worked for a few minutes then quit. I don't see how it could have ever worked, he didnt have it wired right, not a big deal easy to get this stuff mixed up. He did a great job on the layout, soldering and such. Just think he looked at it too hard probably.

Anyway, playing it reminded me how much I hate these masters! :)
Thanks for your unsolicited and totally useless opinion...you're free to go now.
Rock on with your bad self.
 
its always better when everyone is talking about the same thing. IMO PPIMV does not do anything useful in a 2 gain stage amp. Non Master volume arshall and the like. it sounds muddy and loses all its sparkle.

you know what makes for a great set up. PPIMV, and a line out , into a stereo effects unit and into a power amp. so its dry , wet left wet right using a volume pedal to bring in or out your stereo effects. There are inexpensive ways to do it.

also I htink using a .68 on the presence pot makes a slight difference in how the highs respond but ive been sniffin a lot of solder fumes lately. No money for the good stuff right now.
Another angle is to play around with a reverse log 50k after the tail res. I may have the terminolgy wrong but its the 470ohm res on a standard marshall put it between that resistor and the tube cathode. I think the 10k is actually the tail resistor and the 470 o is something else like maybe the cathode resistor? :D
 
Greazygeo":2bqtvspx said:
bds9487":2bqtvspx said:
Greazygeo":2bqtvspx said:
I just had a guy bring me a metro amp he was trying to put in one of these masters. Told me it worked for a few minutes then quit. I don't see how it could have ever worked, he didnt have it wired right, not a big deal easy to get this stuff mixed up. He did a great job on the layout, soldering and such. Just think he looked at it too hard probably.

Anyway, playing it reminded me how much I hate these masters! :)
Thanks for your unsolicited and totally useless opinion...you're free to go now.
Rock on with your bad self.
Thanks. I will. You do the same.
 
bds9487":y3zx1ygq said:
Greazygeo":y3zx1ygq said:
bds9487":y3zx1ygq said:
Greazygeo":y3zx1ygq said:
I just had a guy bring me a metro amp he was trying to put in one of these masters. Told me it worked for a few minutes then quit. I don't see how it could have ever worked, he didnt have it wired right, not a big deal easy to get this stuff mixed up. He did a great job on the layout, soldering and such. Just think he looked at it too hard probably.

Anyway, playing it reminded me how much I hate these masters! :)
Thanks for your unsolicited and totally useless opinion...you're free to go now.
Rock on with your bad self.
Thanks. I will. You do the same.
You know I'm just poking fun right? Though I did forget the smiley face. :)
 
jerrydyer":32cweub9 said:
its always better when everyone is talking about the same thing. IMO PPIMV does not do anything useful in a 2 gain stage amp. Non Master volume arshall and the like. it sounds muddy and loses all its sparkle.

you know what makes for a great set up. PPIMV, and a line out , into a stereo effects unit and into a power amp. so its dry , wet left wet right using a volume pedal to bring in or out your stereo effects. There are inexpensive ways to do it.

also I htink using a .68 on the presence pot makes a slight difference in how the highs respond but ive been sniffin a lot of solder fumes lately. No money for the good stuff right now.
Another angle is to play around with a reverse log 50k after the tail res. I may have the terminolgy wrong but its the 470ohm res on a standard marshall put it between that resistor and the tube cathode. I think the 10k is actually the tail resistor and the 470 o is something else like maybe the cathode resistor? :D
Thanks Jerry. You've convinced me to stick with my hotplate, at least for the moment. It sounds pretty good if I use the -4db setting and a couple of od pedals, although it's still pretty loud.
 
jerrydyer":38zm8r1d said:
they dont sound good in 2 gain stagers. you need at least three.
Not my experience. In my amp in the Plex mode (two gain stages), it sounds really good. Ask Chubtone. He played it in that mode with the PPIMV only 1/3 of the way up and dug it...

Steve
 
sah5150":2rtsgv65 said:
jerrydyer":2rtsgv65 said:
they dont sound good in 2 gain stagers. you need at least three.
Not my experience. In my amp in the Plex mode (two gain stages), it sounds really good. Ask Chubtone. He played it in that mode with the PPIMV only 1/3 of the way up and dug it...

Steve
Are you using the Lamar mod?
 
If I was going to use this master which I have tried and really didn't do much for me is go with the dual 250ka pot with the cut mod on the PI, with 1mA and 470pf cap. I would also play with the values in the PI tail.
I find this master in my opinion works better with 3 gain stages in under otherwise you will drive the PI to hard and it sounds like crap. Also do not like how this screws with the feedback loop. Just my opinion.
 
sah5150":d3bwlkxl said:
jerrydyer":d3bwlkxl said:
they dont sound good in 2 gain stagers. you need at least three.
Not my experience. In my amp in the Plex mode (two gain stages), it sounds really good. Ask Chubtone. He played it in that mode with the PPIMV only 1/3 of the way up and dug it...

Steve

I haven't tried the Lar-Mar, but with the Rich Mod I think the sweet spot was 11:00 or so for me. It sounded very good there. But then it was too damn loud for early morning/late night jamming. Would be fine for gigs though. I would run a hotplate with it most of the time.
 
bds9487":1tt184ni said:
sah5150":1tt184ni said:
jerrydyer":1tt184ni said:
they dont sound good in 2 gain stagers. you need at least three.
Not my experience. In my amp in the Plex mode (two gain stages), it sounds really good. Ask Chubtone. He played it in that mode with the PPIMV only 1/3 of the way up and dug it...

Steve
Are you using the Lamar mod?
Yes, for sure. I have two amps (including a 12000 series 2 gain stage Metropoulos Marshall clone) with them and I think they sound great.

Steve
 
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