Transformer Blueprints for Download

[CJ]

recently added to
https://vacuumbrain.uk/

Egnater Tweaker 88 OPT
Toardarson Line to Line  (do not know model #)
Thordarson 20C55 Choke
and
V72/2  OPT

 

[CJ]

3 more uploaded  https://vacuumbrain.uk/

Tamura 600:600    nice!
Newcomb Input    #46 wire, yikes!
Thorardson 200:50  Transistor output,

think we have scoured up most of them,


they are flying in from all over, be careful out there!

 

[CJ]

recently added to

https://vacuumbrain.uk/

Carnhill VTB 9043    Neve EQ Inductor
Carnhill VTB 9050  Neve EQ Inductor

both in the Neve section and

Sovtek MIG 50 OPT 

in the Guitar Transformers section...

 

[Tubetec]

Loved the war sketch  ;D

Hmm yes indeed the Carnhill inductors carry a premium price tag for what is esentially ,I think, a randomly wound bobbin with taps at set intervals , I see pot cores of various descriptions are available quite cheaply ,but all too often the full mounting and and clamping hardware isnt included . I did find half a dozen or so proper pot cores of the same type used by carnhill and others who made neves inductors along the way , the usual brown bakelite board with pins and the metal clips to hold the cores shut .

Im just in the process of making myself up a winder specifically for smaller fine wire coils , stuff like pickup coils , eq inductors and maybe small signal transformers too , just a really simple arrangement , an old cordless drill motor ,gear box and chuck , then on the other side mini Veeder root counter coupled through a  suitable coil former mount .
I got a neat little dc speed controler off ebay , its just the usual pwm type thing ,but its has a control panel where motor parameters like accel/decel , rpm  , and speed stepping can be accesed , I might just use a 12volt sealed lead acid with a solar panel for juice .  I think a simple guide bar for the wire with adjustable ends stops to prevent wire spilling over the edge of the bobbin will suffice here , I did also get some ceramic pulleys for light gauge wire and I have other odd rollers  bearings and shafts , so Id like to figure out some kind of tension adjustment .

The sections in 'coil winding second edition' relating to the machines for various kinds of winding ,the gearing cogs and cams was a  really great , even though the cam mechanisms now probably  a thing of the past  it serves as a great way to understand the physics of various winding methodologies .

 

[CJ]

if you want a real treat, try plotting the trajectory and acceleration curve of a fixed point on the wire as it is wound on a square bobbin from a fixed length from the winding machine, , 

just uploaded

Fisher X-100-A OPT    on the Fisher page,
Webster Electric (not WE) WST-419  mic input on the Webster Electric page and

Western Electric 197a OPT  (WeCo 121a Line Amp and 16 B mixer)

anybody know the plate current on the output tube? i guessed at 25 ma as to get the DC flux,

free trial is up tomorrow but we signed up!

this 197a takes a weird lam as does the input, hopefully some day...

this guy is loafing along at 4.6 K Gauss at full power, (21 KG is saturation for cold rolled), no wonder people like the sound, low distortion.

 

[Tubetec]

Maybe you could explain more Cj , is it the material itself for the older style units is hard to get or the particular size and style of lam thats the issue. It just seems difficult to get lams  of any kind where I am , there is always plenty of old mains transformers to tear down ,but your never going to find anything in mu metal or other special materials in that lot .

I could ask at work if the boss or his father who started the company have any contacts for transformer supplies , but at this stage with invertor power and switchmodes ,transformers are more or less not handled anymore by the place I work and even when they did rewind them it was KW not W

I could see if I was allowed send out emails  under the company name ,and  pester every lam manufacturer on the planet to see if they'll send me odd ball samples    ;D         

 

[gyraf]

Western Electric 197a OPT  (WeCo 121a Line Amp and 16 B mixer)

Does this supersede the attached..?

(and many, many thanks btw...)

Jakob E.

 

[CJ]

i mean 25B mixer, sorry,  :

same transformer based on the above print, just more info,

cj

 

[CJ]

new and improved prints uploaded..

API 2621  Line to Line    aux return xfmr on API console?

https://img1.wsimg.com/blobby/go/0e07cc59-2f5a-481f-967d-12c7363b86fa/downloads/1d0jsnqbn_832514.png

and

Telefunken V72a OPT  the less desirable cathode output version of the V72

https://img1.wsimg.com/blobby/go/0e07cc59-2f5a-481f-967d-12c7363b86fa/downloads/1d0jdnifh_615268.png


and we added onto the teardown link list in the technical docs section after a GroupDIY search, i will also put them in the transformer Meta>

https://groupdiy.com/index.php?topic=70738.msg902014#msg902014

 

[lukas]

CJ can't You add blueprint for LO2567?...links don't works.

 

[Rob Flinn]

Hi CJ

Any info on the BA6a interstage ?

 

[Newmarket]

Are these files still available online or on this site. The links don't seem to work ?
I notice that this topic seems popular in Sussex UK atm

 

[Winston OBoogie]

I notice that this topic seems popular in Sussex UK atm

Quite a few military bases in Sussex,  a couple that are supposedly secret research facilities so ...  ?     

 

[Newmarket]

Quite a few military bases in Sussex,  a couple that are supposedly secret research facilities so ...  ?   

Well I was referring to Rob Flinn and myself - and I'm definitely in my kitchen in Brighton and not a secret research base

 

[Whoops]

CJ can't You add blueprint for LO2567?...links don't works.

Here is the stuff I have on LO2567

more info on this page:
https://groupdiy.com/index.php?topic=4242.40

 

[Winston OBoogie]

Well I was referring to Rob Flinn and myself - and I'm definitely in my kitchen in Brighton and not a secret research base

Hahahaha     
Sorry,  forgot to change the batteries in my special radar 'invisibility' hat.  Was picking up a shed load of false positives on the screen. All good now.  Roger and over.  Out.

I bet CJ still has all the files but,  have you checked in the  tech docs section? 

P.S.  Thanks Whoops for the LO2567.

 

[Newmarket]

I bet CJ still has all the files but,  have you checked in the  tech docs section? 

I had a quick look but didn't see them but just searched and found this (see below) so I guess that's what we have now.
Thanks.


Re: Audio Transformer Blueprints New
« Reply #1 on: January 08, 2019, 12:51:11 AM »
Quote
ok we slogged through about 13,000 posts and came up with about 110 links to transformer tear downs,

some were unusable because they linked to the closed down vacuumbrain.com site, but we managed to salvage  the following links,  sorry they are not in any type of order,

Music Man HD OPT
https://groupdiy.com/index.php?topic=63730.msg806843#msg806843
Egnater Tweaker 88 Power XFMR
https://groupdiy.com/index.php?topic=64493.msg816686#msg816686
Carvin X-100 OPT
https://groupdiy.com/index.php?topic=65062.msg824417#msg824417
Acoustic 164 OPT
https://groupdiy.com/index.php?topic=65090.msg824778#msg824778

 

[mjrippe]

Go to the Magnetics section of GDIY.  CJ posted tons of blueprints there a couple months back.

 

[Rob Flinn]

Well I was referring to Rob Flinn and myself - and I'm definitely in my kitchen in Brighton and not a secret research base

I'm actually in the South of France at the moment purely by coincidence quite near the Foreign Legion HQ .........

 

[Winston OBoogie]

I'm actually in the South of France at the moment purely by coincidence quite near the Foreign Legion HQ .........

Very cool.  Thought about what your assumed name will be?