[Heathkit] Parasitic Choke DX-60

[K5MYJ]

Just make it like the original!

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"

----- Original Message ----- 
From: "Ken Miller K6CTW" <k6ctw at earthlink.net>
To: <heathkit at mailman.qth.net>
Sent: Sunday, April 22, 2018 9:24 PM
Subject: [Heathkit] Parasitic Choke DX-60


> The parasitic choke on the latest DX-60 I'm rebuilding has definitely seen 
> better days.  So, thought I'd see about making one since they are not 
> available on-line.
>
> It appears to be a 1 watt carbon composition resistor 47 ohm resistor with 
> 4 turns of what appears to be 20 ga tinned ?? wire around the body of the 
> resistor.
>
> Also, in doing research, it appears that it might actually be better to 
> place the coil alongside the resistor rather than around the resistors 
> body.
>
> Are there any special things that need to be considered:
> Is the resistance value critical?
> Is the value of inductor (diameter, number of turns-per-inch and wire 
> gauge) critical
> Is the number of turns of the inductor critical (4 1/2 on the one being 
> removed)
>
> Note that the parasitic choke on a KWM-2 is only about 2 1/2 turns on a 2 
> watt resistor and that is also a 6146.
>
> Any and all thoughts/comments/advice would be most welcome?
>
> 73 - ken miller, K6CTW
>
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