[sdiy] Teac Trivia

[Gene Stopp]

Nope - no pitch control on the 2340!

Best Regards,

- Gene


-----Original Message-----
From: John L Marshall [mailto:john.l.marshall at gte.net]
Sent: Wednesday, April 03, 2002 11:28 AM
To: Gene Stopp; synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] Teac Trivia


Gene,

Your 2340 doesn't have a pitch control does it? The big brother 3340 does
have a pitch control.

The instruction manual for my 2300S rates the motors as follows:  1 dual
speed hysteresis synchronous capstan motor,  2 eddy current induction reel
motors.

Take care,
John


----- Original Message -----
From: Gene Stopp <gene at ixiacom.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, April 03, 2002 10:51 AM
Subject: RE: [sdiy] Teac Trivia


> Hi Magnus!
>
> Well I haven't pulled apart the deck to check, I've just pulled off the
rear
> cover which I like to do every once in a while anyway. It's a mint
condition
> machine, so I'd rather keep it that way if the motor is just a sync motor.
> However the 3340 has a pitch control so it makes me wonder...
>
> I work very slowly these days with hobby projects, mainly scanning the
> internet for tidbits of information beforehand. The kids keep me busy so I
> don't want to do anything without some kind of plan of attack. My
workbench
> philosophy is "get in, get it done, get out, before my wife notices".
>
> An inverter sounds fun anyway. Since it involves HEXFETs and a power
> transformer wired backwards, there's probably going to be some rather
large
> currents which could be exciting. I do like to mess around sometimes with
> slightly dangerous stuff - not so much because of the potential fireworks,
> but more because it's outside of my normal habits and I get to have some
> mental challenge where I have to actually think and discover things. I
like
> that for some reason! Besides, a small sine wave inverter would be nice to
> have around to vary other line-frequency machines like telescope drives
and
> Hammond organs. I've been doing some casual searches and most compact
> inverters these days seem to be square-wave or "modified sine wave" which
> seems like cheating to me. And they certainly aren't tunable.
>
> Best Regards,
>
> - Gene
>
> -----Original Message-----
> From: Magnus Danielson [mailto:cfmd at swipnet.se]
> Sent: Wednesday, April 03, 2002 10:29 AM
> To: gene at ixiacom.com
> Cc: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Teac Trivia
>
>
> From: Gene Stopp <gene at ixiacom.com>
> Subject: [sdiy] Teac Trivia
> Date: Tue, 2 Apr 2002 16:54:03 -0800
>
> > Hi DIY,
>
> Hi Gene!
>
> > Sometimes I get strange ideas... I want to do some tape flanging
> experiments
> > so I was wondering if anybody out there knows whether or not a Teac 2340
> > reel-to-reel uses a crystal oscillator for the capstan motor, or the
> > 60-cycle power line. Anybody got that page from the service manual? Mark
> > Glinsky's page 404'd me when I tried it. If it's the power line I was
> > thinking of building a little sine wave inverter with:
> >
> > a tuneable EXAR 2206
> > some IRF HEXFETs
> > a big 12v filament transmformer wired backwards
> >
> > Pretty goofy, huh. I should have all these parts laying around. At least
I
> > feel at home with you guys :)
>
> Have you looked for a crystal oscillator on any of the PCBs?
>
> You should be able to fairly quickly find the relevant PCB since it
> should be hooked up to the tacho-sense of the capstan wheel.
>
> I fortunately have Tacho-drive on my Studer B67, but sadly enought I
> only have one of them, so I can not run them in parallel for such
> experiments.
>
> Cheers,
> Magnus
>