CJ

Re: Transformer Blueprints for Download
« Reply #40 on: December 22, 2018, 10:32:17 PM »
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

If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html


CJ

Re: Transformer Blueprints for Download
« Reply #41 on: December 23, 2018, 06:21:10 PM »
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!

If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

CJ

Re: Transformer Blueprints for Download
« Reply #42 on: January 01, 2019, 06:09:48 AM »
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...



If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

Re: Transformer Blueprints for Download
« Reply #43 on: January 01, 2019, 09:08:10 PM »
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

Re: Transformer Blueprints for Download
« Reply #44 on: January 03, 2019, 06:58:48 AM »
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, ,  :o

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.

« Last Edit: January 03, 2019, 07:07:48 AM by CJ »
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

Re: Transformer Blueprints for Download
« Reply #45 on: January 03, 2019, 08:35:46 PM »
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

Re: Transformer Blueprints for Download
« Reply #46 on: January 04, 2019, 05:05:40 AM »
Western Electric 197a OPT  (WeCo 121a Line Amp and 16 B mixer)

Does this supersede the attached..?

(and many, many thanks btw...)

Jakob E.
..note to self: don't let Harman run your company..

CJ

Re: Transformer Blueprints for Download
« Reply #47 on: January 05, 2019, 01:20:11 AM »
i mean 25B mixer, sorry,  ::)

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

cj
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

CJ

Re: Transformer Blueprints for Download New
« Reply #48 on: January 07, 2019, 11:09:46 PM »
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


« Last Edit: January 08, 2019, 12:56:49 AM by CJ »
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

 

Related Topics

  Subject / Started by Replies Last post
2 Replies
1056 Views
Last post May 02, 2006, 03:01:35 PM
by dale116dot7
2 Replies
1703 Views
Last post February 28, 2008, 12:41:54 AM
by bcarso
1 Replies
1387 Views
Last post February 04, 2010, 04:28:00 AM
by abbey road d enfer
8 Replies
1964 Views
Last post September 19, 2011, 01:34:55 PM
by pucho812