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- Path: sparky!uunet!stanford.edu!rock!taco!npstewar
- From: npstewar@eos.ncsu.edu (NATHAN PHILLIP STEWART)
- Subject: Re: Tube amp transformers
- Message-ID: <1992Dec14.174659.18860@ncsu.edu>
- Originator: npstewar@c00722-239rd.eos.ncsu.edu
- Keywords: tubes transformers
- Sender: news@ncsu.edu (USENET News System)
- Reply-To: npstewar@eos.ncsu.edu (NATHAN PHILLIP STEWART)
- Organization: North Carolina State University, Project Eos
- References: <Bz0GpF.Fyn@hfglobe.intel.com> <Bz4FK9.Fx3@watdragon.uwaterloo.ca> <Bz8xMo.5v7@dcs.glasgow.ac.uk>
- Date: Mon, 14 Dec 1992 17:46:59 GMT
- Lines: 30
-
-
- I pulled out the schematics section of my Groove Tubes book, and was looking
- through some classics the other night in light of our discussion of maximum
- tube voltages. I found some interesting things, which generated some questions.
-
- 1) What exactly is the relation between plate voltage and the level where output
- distortion begins. As far as I understand it now, the higher the plate
- voltage, the higher output level before distortion sets in. Is this the
- relationship? Is it more complex than this? (of course it is)
-
- 2) With the Deluxes, plate volage ran from 350V to 410V from early years to
- later years for 6V6's. With various other Fenders using 6L6's, plate voltage
- ran up to 470V on later years, but some early models were under 410V.
- Does this mean that as long as my amp with 6L6's has a plate voltage of 410V
- or less that I could use 6L6's? If it could work, would it be effectively
- lower my power output but mean that my power section might not be able to
- distort?
-
- 3) About measuring plate voltage, it occured to me that if the impedance of
- my voltmeter is not high enough I could fry my voltmeter and quite possibly
- more (me for instance.) Is this a real concern, or do Multimeters generally
- have a high enough impedance that I don't need to worry.
-
- 4) If I want to leave my 6L6's, but drop their plate voltage (This depends on
- the answer to the first question), without changing my transformer, can this
- be done. (Since my carvin uses some FET EQ circuits and reverb buffering,
- I can't just sub a lower power transformer.)
-
- npstewar@eos.ncsu.edu
- Nathan Stewart
-