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Re: [Amps] rf choke on output

To: Amplificadores Lineales <amps@contesting.com>
Subject: Re: [Amps] rf choke on output
From: GGLL <nagato@arnet.com.ar>
Date: Mon, 27 Mar 2006 23:42:29 -0300
List-post: <mailto:amps@contesting.com>
        I've heard many people who stated that it is only "to make smoke":) so 
you 
could realize what happened.
        Either the plate choke or the line fuse that fails open is better than 
nothing, so what wire diameter must be chosen?. I would like to hear other's 
opinion.

Best regards
Guillermo - LU8EYW.

Vic Rosenthal escribió:
> Partain, Chuck wrote:
> 
>>I read some info about the rf choke on the output of the amps to work in case 
>>the blocking cap fails.
>>
>>I see different values listed plus I read in these archives that one can be 
>>made from #24 wire???
>>
>>can someone shed a little more light on this for me as I do not have one 
>>installed...YET!
>>
>>I see some call for a z-50???
> 
> 
> A Z-50 is 7 uh.  This would be suitable for a VHF amplifier, as it would
> have a reactance of about 80 ohms at 1.8 MHz.  Many amplifiers have
> pie-wound 1 or 2 mh chokes in this position; however, since the type of
> chokes used are often rated at 300 ma, they would possibly burn out
> before blowing a fuse if the blocking capacitor fails.
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