Hi all,
I incorporated the Lar/Mar into each of my three amp builds (JTM 45, '68 spec Superbass and a '63 Brownface Vibroverb replica) and so far I'm quite happy though I'd love to avoid the affects on the NFB at lower PPIMV settings.
I would love to hear an account of how the two compare from anyone who tried the Frondelli.
Frondelli PPIMV on Rob Robinette's site:
https://robrobinette.com/Generic_Tube_A ... ter_Volume
Seems to basically differ from the Lar/Mar by having the wires from the PI caps connect to the wiper terminals and the other pair of wires running from the left terminals to pin 5 of the power tubes instead of going from the wiper to pin 1 (actually - to the 5k6 swamp resistors on pin 5 in my Marshalls).
It also doesn't need the failsafe resistors.
Frondelli vs Lar/Mar PPIMV
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Elad E
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Roe
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Re: Frondelli vs Lar/Mar PPIMV
slightly different. the taper may differ
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Super 100 amps: 1202-119 & 1202-84
JTM45 RS OT JTM50 JMP50 1959/2203/34/39
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Super 100 amps: 1202-119 & 1202-84
JTM45 RS OT JTM50 JMP50 1959/2203/34/39
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Elad E
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Re: Frondelli vs Lar/Mar PPIMV
Thanks Roe,
Next time I open up the Vibroverb I'll switch things around and report back if I liked it, I gather from your answer that the difference is negligible.
Next time I open up the Vibroverb I'll switch things around and report back if I liked it, I gather from your answer that the difference is negligible.