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previous: Mr Clean Steve,My 5F6A circuit is st... -- 10/28/1998 10:45 AM View Thread

Re: WHAT'S THE BEST CATHODE RESISTOR VALUE??

10/28/1998 8:02 PM
Steve A.
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Re: WHAT'S THE BEST CATHODE RESISTOR VALUE??
Dave:  
 
    I've heard a lot of great things about the HotBox but haven't seen one myself. Putting the power supply together for a single stomp box seems like a real waste to me; I'd rather put together a 2 or 3 space rack mount unit with maybe 3 or 4 different tube preamps and fx running off the same tranny (or at least double them up and make the HotBox and VibroBox in the same case/chassis). The VibroBox is supposed to have a great preamp even with the tremelo off- a cleaner sound much better than the clean channel on the HotBox.  
 
    So your amp is basically a 5F6A clone? Although there may be a subtle interaction between the two channels, adding a switchable bright cap should free up a tube stage without losing the basic sound of the bright channel. I've been wondering about using the trick in the new Victoria Tweed Twin amp: Input #1 would be connected to both stages of V1, while Input #2 would be connected only to V1A. One variation on that would be to use different Ck/Rk values for each stage and maybe add a switch to select which stage would be used for Input #2. (The Pittman book shows how identical stages were run in parallel on the 5E8-A Twin.)  
 
    From what I've read here, doubling up the initial preamp stage with an identical stage doesn't really boost the gain of the preamp much, but it is supposed to increase the signal-to-noise ratio. Any thoughts on that? (I'd think that tuning each stage with different Ck/Rk values would result in a fuller sound so that may be the way to go.)  
 
Steve Ahola

 
Replies:
Dave H. I guess you’re right. The Hotbox ... -- 10/30/1998 9:23 PM