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Hoffman Amps Forum image Author Topic: "Type 3" PPIMV mod. Is this correct?  (Read 2840 times)

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Offline 1blueheron

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"Type 3" PPIMV mod. Is this correct?
« on: November 19, 2021, 01:04:02 pm »
Does this look correct as a Type 3 MV for this amp.
« Last Edit: November 20, 2021, 12:34:30 pm by 1blueheron »

Offline sluckey

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Re: "Type 3" PPIMV mod. Is this correct?
« Reply #1 on: November 19, 2021, 01:30:20 pm »
yes
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline Willabe

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Re: "Type 3" PPIMV mod. Is this correct?
« Reply #2 on: November 19, 2021, 02:31:13 pm »
Have you been reading this thread? It talks about that Type 3 MV. Most guys do not like it.

https://el34world.com/Forum/index.php?topic=28190.msg310566#msg310566

Lar-Mar MV is the most liked.

Offline 1blueheron

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Re: "Type 3" PPIMV mod. Is this correct?
« Reply #3 on: November 19, 2021, 03:24:29 pm »
Have you been reading this thread? It talks about that Type 3 MV. Most guys do not like it.

https://el34world.com/Forum/index.php?topic=28190.msg310566#msg310566

Lar-Mar MV is the most liked.

I will give it a read.  Thanks for pointing me to it.

Offline Bieworm

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Re: "Type 3" PPIMV mod. Is this correct?
« Reply #4 on: November 20, 2021, 08:29:15 am »
Have you been reading this thread? It talks about that Type 3 MV. Most guys do not like it.

https://el34world.com/Forum/index.php?topic=28190.msg310566#msg310566

Lar-Mar MV is the most liked.

I will give it a read.  Thanks for pointing me to it.
Stop wasting your time on that type 3 MV. Add a LarMar and call it a day. You won't look back. It's the best PPIMV design out there...
AND.. since your amp is cathode biased, did you ever consider a VVR ? It's pretty easy to install on a Cathode biased amp. BTW, you switched the naming on the cathode resistor and cap.
« Last Edit: November 20, 2021, 08:33:04 am by Bieworm »
"This should be played at high volume.. preferably in a residential area"

Offline d95err

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Re: "Type 3" PPIMV mod. Is this correct?
« Reply #5 on: November 20, 2021, 09:34:14 am »
I can also add that I’ve found that type of ”cross-line” master almost useless. At least if you intend to reduce volume by more than a few decibels.

Offline 1blueheron

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Re: "Type 3" PPIMV mod. Is this correct?
« Reply #6 on: November 20, 2021, 12:37:41 pm »
you switched the naming on the cathode resistor and cap.

Fixed it.

 


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