IF xfmrs
 

Hi,
I am building a tube type SW AM radio frm scratch and need the IF output
transformer that drives the detector. 455kc IF. Anyone help?
Jim w1hrm

jim breeeyar wrote:
I am building a tube type SW AM radio frm scratch and need the IF output
transformer that drives the detector. 455kc IF. Anyone help?

Has it got to be a big 1950s style one?

You can use the little Toko types without any problem, honestly, but
they don't look right unless you use submini tubes, of course.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Hi,
The problem might be that the impedances arent correct and they cant
take the voltages and current. I could be wrong but then.....
thanks.
Jim

Scott Dorsey wrote:

jim breeeyar wrote:

I am building a tube type SW AM radio frm scratch and need the IF output
transformer that drives the detector. 455kc IF. Anyone help?


Has it got to be a big 1950s style one?

You can use the little Toko types without any problem, honestly, but
they don't look right unless you use submini tubes, of course.
--scott

You could always parallel-feed from a choke, and isolate the IF transformer
from DC with a cap. This would provide a much nicer environment. Then if
you had to you could build big boxes to put the transformer and bypass stuff
into, and it'd even look right.

"jim breeeyar" wrote in message
...
Hi,
The problem might be that the impedances arent correct and they cant
take the voltages and current. I could be wrong but then.....
thanks.
Jim

Scott Dorsey wrote:

jim breeeyar wrote:

I am building a tube type SW AM radio frm scratch and need the IF output
transformer that drives the detector. 455kc IF. Anyone help?


Has it got to be a big 1950s style one?

You can use the little Toko types without any problem, honestly, but
they don't look right unless you use submini tubes, of course.
--scott

At a local junk store buy a tube type radio and salvage the IF cans out of it.

Good luck with the project.

73 Bob W7AVK

Tim Wescott wrote:

You could always parallel-feed from a choke, and isolate the IF transformer
from DC with a cap. This would provide a much nicer environment. Then if
you had to you could build big boxes to put the transformer and bypass stuff
into, and it'd even look right.

"jim breeeyar" wrote in message
...
Hi,
The problem might be that the impedances arent correct and they cant
take the voltages and current. I could be wrong but then.....
thanks.
Jim

Scott Dorsey wrote:

jim breeeyar wrote:

I am building a tube type SW AM radio frm scratch and need the IF output
transformer that drives the detector. 455kc IF. Anyone help?


Has it got to be a big 1950s style one?

You can use the little Toko types without any problem, honestly, but
they don't look right unless you use submini tubes, of course.
--scott

Behold, jim breeeyar signalled from keyed 4-1000A filament:

Hi,
I am building a tube type SW AM radio frm scratch and need the IF output
transformer that drives the detector. 455kc IF. Anyone help? Jim w1hrm

I have a nice article for you he
http://geek.scorpiorising.ca/455KHz.html

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca

Thanks for the article. I will work up the courage to try it.
Jim w1hrm

Gregg wrote:
Behold, jim breeeyar signalled from keyed 4-1000A filament:


Hi,
I am building a tube type SW AM radio frm scratch and need the IF output
transformer that drives the detector. 455kc IF. Anyone help? Jim w1hrm


I have a nice article for you he
http://geek.scorpiorising.ca/455KHz.html