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 Post subject: Need an RF choke for Zenith 6S262 chassis 5905 part # 20-135
PostPosted: Nov Thu 25, 2021 5:40 am 
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Location: Baton Rouge, Louisiana
Hello all. I’m in need of an RF choke for my Zenith 9S262 chassis 5905..
The Zenith part number is 20-135.
Does anyone have a cross reference to Miller or other coil manufacturers. Someone has contacted me with a large number of NOS coils and May have a coil that substitutes. Any help would be appreciated.
Dave Bertinot.


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 Post subject: Re: Need an RF choke for Zenith 6S262 chassis 5905 part # 20
PostPosted: Nov Thu 25, 2021 3:31 pm 
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I don't have it but it is model 9s262. 9 tube not 6 tube.


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 Post subject: Re: Need an RF choke for Zenith 6S262 chassis 5905 part # 20
PostPosted: Nov Thu 25, 2021 4:51 pm 
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Location: near ST Louis Mo 62002
It doesn't say in the Zenith service manual what value 14 is , it's center tapped and for one of the short wave bands .You will most likely have to have one out of a parts radio or have someone measure the inductance for you .

A photo of it would be nice .

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 Post subject: Re: Need an RF choke for Zenith 9S262 chassis 5905 part # 20
PostPosted: Nov Fri 26, 2021 6:02 am 
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A picture is attached.


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 Post subject: Re: Need an RF choke for Zenith 6S262 chassis 5905 part # 20
PostPosted: Nov Sun 28, 2021 2:10 am 
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Joined: Jul Sun 09, 2006 3:11 am
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Location: Clearwater, KS
That's exactly what's wrong with my 9S204 chassis. Mine has an obvious loose wire. I didn't notice the loose wire until I saw this posting.


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 Post subject: Re: Need an RF choke for Zenith 6S262 chassis 5905 part # 20
PostPosted: Nov Mon 29, 2021 5:35 pm 
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Location: Clearwater, KS
Update: I was able to find the loose ends and solder them. You might try doing the same.


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 Post subject: Re: Need an RF choke for Zenith 6S262 chassis 5905 part # 20
PostPosted: Nov Mon 29, 2021 10:06 pm 
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AuroraOldRadios wrote:
Update: I was able to find the loose ends and solder them. You might try doing the same.


If you have an inductance meter would you measure yours to it can be documented for dbertinot and will make note of it in my Zenith manual II for others in need of the values .

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 Post subject: Re: Need an RF choke for Zenith 6S262 chassis 5905 part # 20
PostPosted: Nov Mon 29, 2021 11:18 pm 
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Location: Clearwater, KS
battradio@ wrote:
AuroraOldRadios wrote:
Update: I was able to find the loose ends and solder them. You might try doing the same.


If you have an inductance meter would you measure yours to it can be documented for dbertinot and will make note of it in my Zenith manual II for others in need of the values .

Sorry, I don't have an inductance meter.


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 Post subject: Re: Need an RF choke for Zenith 6S262 chassis 5905 part # 20
PostPosted: Dec Thu 02, 2021 6:11 pm 
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Joined: Dec Sat 28, 2019 4:18 pm
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Location: Corinth, TX
The part looks more like a BCB mixer/osc coil, not a simple RF choke.

A simple Chinesium LC-100A would be adequate to measure the windings.

If you do get one of these, make sure you get a "real" MingHe branded one, not a clone. Check the forum archives.

John


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