NEED HELP ON IF FILTERS

[Gary Schafer]

Take a look at the Kiwa filters. They are cheap and work quite well. Call them and
ask, they have info on installing them in tube radios as well as solid state
radios. Easy to put in the IF chain.

http://www.kiwa.com/

73
Gary  K4FMX


Dee Almquist wrote:

> Fellow BA'rs
> Started an interesting project. National HRO-50T. Real clean radio & has
> been recapped with new stuff. Got it working pretty well. Still have
> problems with 3 of the coils sets to do yet but radio senseitivity not bad.
> This is a very stable radio, almost no drift! However, it needs help in the
> IF. Since it is single conversion, adjacent channel rejection leaves
> something to be desired. Seems the easest way is a 455kc 8 pole filter @ 6kc
> (and maybe another @ 4kc) for AM mode. Problem is the cost!!! Looking @
> ceramic filters like we used in modern FM transceivers. But they dont have
> the dynamic range that crystal filters have. Double conversion is a
> possibility with miniture circuitry @ 60 kc. (limited space). Any one have
> any experience with sooping up IFs? Any place on the internet for this kind
> of project?
> 73 es Dee
> W4PNT
> http://w4pnt.8k.com
> Patty & Dee's Marina Collectors of "firebottle" radios
> Dee Almquist
> 534 W. Main St.
> Waynesboro, Va. 22980
> (540)249-3161 Cell: (540)480-7179
>
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