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Please help identify this TOKO filter part. "1av4F10B00102"

 

Here are photos of the filter that bought in 50 pcs in scrap market.
?Unable to identify it , I need your help. It hs two 7mm transformer type coils with a 3 pin to-92? supposed to be a dual varicap. Each transformer hasd a caoacitor included, like IFTs. All three moulded in a plastic enclosure.

?Thanks in anticipation
regards
sarma
?vu3zmv

toko filter 1.jpg
toko filter 2.jpg
toko filter 3.jpg

Rahul Srivastava
 

I think this is a common part that was used in BC AM/FM RX, the two transformers are supposed to go in series one for 455khz ( Red..??) another at 10.7Mhz for FM.

73

Rahul VU3WJM
 

Thanks Rahul jee
?i dismantled one unit
?let me measure the winding and inductance data.
?The semi conductor component is marked "590" over it.


Regards
MVS Sarma
?

On Sun, May 20, 2018 at 10:17 PM, Rahul Srivastava via Groups.Io <vu3wjm@...> wrote:
I think this is a common part that was used in BC AM/FM RX, the two transformers are supposed to go in series one for 455khz ( Red..??) another at 10.7Mhz for FM.

73

Rahul VU3WJM
 

Looks like ratio detector coil set for 10.7mhz.
If not its a IF with a ceramic filter again 10.7mhz between them.

If the third one was not so fuzzy (too close) we can speculate better.

Allison
 

Thanks Allison.
the coils inside have very few turns? less than 5 or so? the 3 terminal middle part is thinner than TO92 and has marking 590 over it. Perhaps it is a dual varicap. as it showing 2 diodes with resppect to centre.
?sorry for bad photos
?i shall try with a better camera.


Regards
MVS Sarma
?

On Mon, May 21, 2018 at 12:19 AM, ajparent1/KB1GMX <kb1gmx@...> wrote:
Looks like ratio detector coil set for 10.7mhz.
If not its a IF with a ceramic filter again 10.7mhz between them.

If the third one was not so fuzzy (too close) we can speculate better.

Allison


 

here are better photos using nikon s6800
?the dual varicap lead has broken and you find balance pins.

F10B00102 bottom view.jpg
F10B00102 side view.jpg
F10B00102 top view _TOKO_.jpg
dual varicap 3rd wire broke.jpg

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