3T77A FS


Glenn Little
 

Does any one want a 3T77A for $30.00 plus postage?
It is in good condition, but, was raped by an audio fool for the 6DJ8s and 6688. The nuvistor and Q135 are also missing. Otherwise it is complete. This has been in storage for a while, but appears complete less the noted items. The knobs appear in good condition. It is not bent or mangled.

Glenn
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Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@arrl.net AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA-LM ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"


Jim Adney
 

On Thu, Sep 9, 2021 at 08:12 AM, Glenn Little wrote:

Does any one want a 3T77A for $30.00 plus postage?
It is in good condition, but, was raped by an audio fool for the 6DJ8s and
6688. The nuvistor and Q135 are also missing. Otherwise it is complete. This
has been in storage for a while, but appears complete less the noted items.
The knobs appear in good condition. It is not bent or mangled.
I have to admit that I'm tempted, but looking over my herd, I see that I already have three 3T77s and two 3T77As, none of which I've built up the courage to see if they worked. I should really put some effort into those, but I've never worked on sampling plugins. Just another learning experience that I've put off for too long.

As an aside, would anyone care to offer some hints on how to start? For example, can I test a 3Tx plugin with a known good 3Ax plugin, at least for determining basic functionality? Likewise for a 3Sx plugin with a known good 3Bx plugin?


Ed Breya
 

A complete (except for the tubes) 3T77 carcass would be handy as a spare parts donor to anyone fixing or rebuilding others. I think the most important items are the tunnel diodes and back diodes.

Ed


David Holland
 

On Fri, Sep 10, 2021 at 5:52 PM Jim Adney <jadney@vwtype3.org> wrote:


I have to admit that I'm tempted, but looking over my herd, I see that I already have three 3T77s and two 3T77As, none of which I've built up the courage to see if they worked. I should really put some effort into those, but I've never worked on sampling plugins. Just another learning experience that I've put off for too long.
Yah, "sames"... It'd be a spares at best for me. And there's the
whole space problem that's creeping up in my basement.


As an aside, would anyone care to offer some hints on how to start? For example, can I test a 3Tx plugin with a known good 3Ax plugin, at least for determining basic functionality? Likewise for a 3Sx plugin with a known good 3Bx plugin?
I believe plugin compatibility is all in the documentation. There
are certain sets of 3T/3S that will work with regular plugins such as
the 3B/3As (for example the 3T2).

I'm in the same situation, (chicken meet egg, egg meet chicken). My
plan (if I find my round2it) is to fix one of my 3T series that works
with a regular amplifier, then marry the now working 3T with a to be
repaired 3S, and etcetera and so forth.

David


Brian
 

I am tempted but I fear the shipping will be a real killer .I have a non-working 3T77A that is complete and would want to try and one good one from the two
I also have a 3T4 in a similar state
regardsBrian Skilton

On Saturday, 11 September 2021, 00:11:01 BST, David Holland <david.w.holland@gmail.com> wrote:

On Fri, Sep 10, 2021 at 5:52 PM Jim Adney <jadney@vwtype3.org> wrote:


I have to admit that I'm tempted, but looking over my herd, I see that I already have three 3T77s and two 3T77As, none of which I've built up the courage to see if they worked. I should really put some effort into those, but I've never worked on sampling plugins. Just another learning experience that I've put off for too long.
Yah, "sames"... It'd be a spares at best for me.    And there's the
whole space problem that's creeping up in my basement.


As an aside, would anyone care to offer some hints on how to start? For example, can I test a 3Tx plugin with a known good 3Ax plugin, at least for determining basic functionality? Likewise for a 3Sx plugin with a known good 3Bx plugin?
I believe plugin compatibility is all in the documentation.    There
are certain sets of 3T/3S that will work with regular plugins such as
the 3B/3As (for example the 3T2).

I'm in the same situation, (chicken meet egg, egg meet chicken).  My
plan (if I find my round2it) is to fix one of my 3T series that works
with a regular amplifier, then marry the now working 3T with a to be
repaired 3S, and etcetera and so forth.

David


Glenn Little
 

The 3T77A is spoken for.

Glenn

On 9/10/2021 5:52 PM, Jim Adney wrote:
On Thu, Sep 9, 2021 at 08:12 AM, Glenn Little wrote:

Does any one want a 3T77A for $30.00 plus postage?
It is in good condition, but, was raped by an audio fool for the 6DJ8s and
6688. The nuvistor and Q135 are also missing. Otherwise it is complete. This
has been in storage for a while, but appears complete less the noted items.
The knobs appear in good condition. It is not bent or mangled.
I have to admit that I'm tempted, but looking over my herd, I see that I already have three 3T77s and two 3T77As, none of which I've built up the courage to see if they worked. I should really put some effort into those, but I've never worked on sampling plugins. Just another learning experience that I've put off for too long.
As an aside, would anyone care to offer some hints on how to start? For example, can I test a 3Tx plugin with a known good 3Ax plugin, at least for determining basic functionality? Likewise for a 3Sx plugin with a known good 3Bx plugin?
--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@arrl.net AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA-LM ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"


Jim Adney
 

On Fri, Sep 10, 2021 at 08:21 PM, Glenn Little wrote:

The 3T77A is spoken for.
Good, that saves me from agonizing over it. ;-)

A question on those delicate sampling diodes: Can I test them using the Fluke DVM diode test mode? Or does the reverse voltage go too high? (IIRC, it can get to something like 2.2 V, but maybe it's higher.)