previous: Man o'Blues I think there's some confusion goin... -- 11/9/2000 8:29 PM

Re: Princeton flubbiness: circuit, speaker, tubes?

11/9/2000 11:49 PM

Shea

Re: Princeton flubbiness: circuit, speaker, tubes? Mr. Blues, what I did in my Twin was change those resistors you're talking about to BF specs but leave the 1k resistor between the 220k and ground, leaving the wire at the junction between the 220k and the 1k, and pulling out the pair of wires that straddle a 1 meg resistor elsewhere in the reverb circuit. This made the boost in the Twin work the way I remember my ol' PR.     Some people say they prefer the silverface reverb circuit to the blackface circuit, and claim it is more lush. I don't know if the specs you're referring to are the silverface reverb specs in general, or rather specs that were only used for SFs with boost. You seem to believe the latter, I'm inclined towards the former, until I see schematics that convince me otherwise.     The only silverface I've owned WITHOUT boost is my '68 bandmaster, and I think its reverb specs were all blackface (it's a weird circuit with some BF specs in the pi, a bias balance circuit with different specs than later silverfaces, and 150 ohm resistors on the cathodes of the power tubes). That bandmaster has the lushest reverb I've heard in my life.     If there's one thing we agree on here, it's that blackface specs for reverb are A-OK. I still suggest leaving in that 1k resistor and the wires for the Princeton/Deluxe style boost. The difference between 220k over ground and 221k will not be noticeable; it will be within the tolerance of a single 220k resistor.     Shea

 

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Man o'Blues I was referring only to the PR in m... -- 11/10/2000 7:57 PM