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Re: Music Instrument Tube Amps conversion to Tesla use?
Original poster: "David Trimmell by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davidt-at-pond-dot-net>
Let me jst say this again: Not going to happen! You have some audio amps
that, even though slightly modified (understatement?!), are worth some
real money. Don't destroy these to attempt to make something that is not
possible. The only things that may be good for a vac coil would be the
filiment tranies, plate tranies, and tubes (6L6's), and only for a whimpy
VTTC! Just think, where is the oscillator? But you could use one of these
to amplify a audio signal to modulate a real VTTC!
Regards,
David Trimmell
On Wed, 6 Jun 2001, Tesla list wrote:
> Original poster: "albert hassick by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <uncadoc-at-juno-dot-com>
>
> Hi David, your words are well taken and I understand what you are saying,
> but who would pay me to buy a Twin Reverb amp head that has been
> mecanically cut and removed from its original 2-12 speaker body. This
> thing has been cut and a lower shelf attached to its bottom and
> re-tolexed so it now is a "twin reverb head" 187 watt head sitting upon a
> bandmaster 2-12 cabinet with Electrovoice SRO 12 speakers. In other
> words, the Twin head now sits atop a prime Bandmaster 2-12 bottom that
> has had both Fender 12" speakers replaced with SRO's. The Fender Twin
> head is cut to fit exactly atop the original 88 watt bandmaster cabinet
> in place of the original 88 watt bandmaster head. So now the Fender
> setup with the 187 watt Twin head atop the Bandmaster cabinet really adds
> to the depth and tonality of the package, since the SRO12: dual speakers
> are rated at 300 watts each and 150 watts rms, giving a Bandmaster
> package capable of 300 watts rms. I procured the original fender 12"
> speakers but set them aside since they were not needed. The bandmaster
> sounds exellent with my electric RMI piano played through it. And the
> Peaveys, one is from a vintage tweed 2-12" cabinet but the cabinet and
> speakers are gone, all that is left is the amp head as a chassis. The
> second Peavey tweed is a 4x10" cabinet with all four speakers missing,
> the amp is the only thing intact. All these Peavey amps need new filter
> capacitor banks since they hum and buzz somewhat. But the bottom line is
> the three amp heads all work good, and that is why I wanted to try to
> convert them to VTTC devices.Lets see, they are all rated at about 187
> watts peak times 3 =about 561 peak watts. So how can I convert these
> threre amps to a real good VTTC? Anyone out there with a schematic that
> can couple these three 187 watt heads into a Good Old Tesla?
>
> Al. Wed, 06 Jun 2001 16:49:57 -0600 "Tesla list" <tesla-at-pupman-dot-com>
> writes:
> > Original poster: "David Trimmell by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>" <davidt-at-pond-dot-net>
> >
> > Hi Al,
> >
> > In my oppinion I would keep the amps as is, as they are worth much
> > more
> > then the components needed to build a VTTC. The 6L6's are only 20-30
> > watt
> > (plate dissipation), and I am not too sure how well they opperate in
> > class
> > C mode. I am sure you could build a VTTC around a audio amp tube as
> > the
> > 6L6 (actually, there are some old articles describing just this,
> > "lil'
> > Tesla coil" or some thing comes to mind), but realize it will be
> > "lil'".
> > Why not just use a 833, 803, 813, 304, 811, etc., and a MOT? These
> > can be
> > had for not much more then a new 6L6, at least the good pulls.
> >
> > Regards,
> >
> > David Trimmell
> >
> > On Wed, 6 Jun 2001, Tesla list wrote:
> >
> > > Original poster: "albert hassick by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>" <uncadoc-at-juno-dot-com>
> > >
> > > Hi all list members. Would it be possible to make a VTTC from a
> > musical
> > > instrument guitar amplifier? Reason I ask is I came across a
> > circa 60's
> > > Fender Twin Reverb amp and two circa 70's Peavey Vintage Amps
> > guitar
> > > amps. All three have a quad 6L6GC output, so this would give an
> > > equivalent of 12 6L6GC tubes. The amps are OK but the filter
> > banks are
> > > weak, but I do not think that those filter caps would even be used
> > with a
> > > VTTC. Please correct me about the filter caps if I am wrong. All
> > three
> > > amps have good line voltage supply trannys and output trannys and
> > tubes.
> > > Any possibility that these three amps could be turned into a Tesla
> > Drive
> > > or are the voltages and plate currents too low with a 6L6GC to do
> > any
> > > real good in a Tesla circuit. Anyone out there use or toyed with
> > music
> > > instrument amps as a base for a VTTC? The tube trannys appear
> > to put
> > > out about 460 volts each unloaded, however a partial schematic
> > suggests
> > > 370 working volts but I do not know what the output current is,
> > although
> > > I guess it should be somewhat substantial if all three amps were
> > to be
> > > connected in series. I am just speculating here about using the
> > three
> > > amps in series to triple the current output. Will these amps
> > work as a
> > > VTTC? Or would it be possible to convert each amp into a single
> > small
> > > VTTC supply. I would really like to convert these into a audio
> > modulated
> > > VTTC if at all possible. Thank You. Al.
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