Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Kolster K-20 A.F. Transformer
#1

Hello, all.

Tried posting this on another site but didn't get any responses. Since I've always had good luck here, I thought I'd ask another newbie question: is anyone able to tell me what size A.F. transformers are used in a Kolster K-20? They are marked AFT1 and AFT2 on the schematic which can be found here:

http://www.nostalgiaair.org/pagesbymodel...040092.pdf

Thank you in advance for any help.

Dave
#2

Perhaps a couple universal output transformers like the P-T291 from AES?
#3

Hi Dave,
>able to tell me what size A.F. transformers are used in a Kolster K-20?
I'm not sure I understand what you are asking. Are you referring to physical size?? Or electrical equivalent??

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
#4

Electrical equivalent
#5

Ok What you are looking for are https://www.tubesandmore.com/products/tr...tage-10-ma  for both. If the transformers are enclosed and have a 1/2" core you can buy just the replacement winding.

GL

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
#6

Other then the generic AES transformer you could try an Edcor one, or try the solid state substitute circuit that was featured in the A.W.A Old Timer's Bulletin about ten years ago, I think it's posted online somewhere.
Regards
Arran
#7

Thank you for the help.

Dave




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Cannot Adjust an IF Transformer’s cores
Outstanding work indeed. I wish I could come up with solutions like this.slford310 — 11:16 PM
Cannot Adjust an IF Transformer’s cores
The abilities of our 'Phorum Pholks" never ceases to amaze me! Fantastic fabrication, Joseph! I'm waiting now for...GarySP — 08:27 PM
PT-6 antenna connections
Thanks. I never realized that was a notch noted in the schematic as described. I’ll recheck my wiring.bridkarl — 08:13 PM
Cannot Adjust an IF Transformer’s cores
Thank you! I was quite new to the Phorum when I started this post, so I feel like it might be advantageous to publish a ...jrblasde — 08:07 PM
PT-6 antenna connections
Notice in the schematic the notch at the bottom of the antenna coil is between pins 3 & 4. Yes, pin 6 of the 7C6 is...RodB — 07:34 PM
bridkarl
I have two PT-6 chassis. On both there is a blue wire that runs from the above chassis transformer to pin 6 of 7C6. So t...bridkarl — 07:23 PM
Cannot Adjust an IF Transformer’s cores
Joseph, now you are an engineer!!RodB — 06:37 PM
PT-6 antenna connections
Hi, reading your explanation I can see the confusion. If you take it one connection at a time it should result in a desi...RodB — 06:34 PM
Cannot Adjust an IF Transformer’s cores
It works! I received the PCBs this morning in the mail, and put everything together. I reused the base from the original...jrblasde — 04:32 PM
PT-6 antenna connections
I seem to have lost my way on this PT-6. I see the antenna aerial transformer schematic - I’m reading pins 1 through ...bridkarl — 12:30 PM

[-]
Who's Online
There are currently 4153 online users. [Complete List]
» 1 Member(s) | 4152 Guest(s)
Avatar

>