[AMRadio] RE: Receiver update.

[Brett Gazdzinski]

John,


>
>     Hi Brett,
>
>     I am really enjoying reading your story ... please keep writing.
> My dad and I built my first superhet receiver from the 1965
> hand book in I guess late 68.  Boy are you bringing back
> memories, and I'm going to reclaim that thing from my dads
> basement soon too.

Yes, dig it out and get it working well!

>
>     I wound coils for the 1700kc IF and then bought a crystal
> (financed with soda bottles, of course) and it really settled the
> thing down.  What a difference.  I'm no engineer, however,
> have you considered a crystal filter, 455 kc crystals are pretty
> available.
>

I never liked crystal filters for AM reception, they seem
good for CW though.


>     I have some carcasses with 455 IF cans (BC sets), I hate
> to part with them but if you can't locate any ... I'll do it just for
> the sheer fun of reading the end of this story !  Can't you find
> an old BC radio in an antique or junk shop and junk the cans.
> Perhaps you are looking for higher quality ones, like I said, I'm
> no engineer.

I have broadcast cans, both 455 and 262 KHz, its a better
communications receiver type IF can that I would try.
The broadcast cans are designed for wide Hi Fi, like 16 kHz.



>
>     When you get the receiver done, it would be fabulous to put
> a nice push pull set of 6l6's in the audio !

I had initially planned on doing that, but decided against it
so far.
I have a selection of hi fi output transformers, but use a station
amp (Marantz)into a big speaker, and hook up all the receivers
through it, so I only have one speaker except for the one
I also leave on the SX17 because its push pull 6l6,s.

The Scott has a built in speaker I use when just playing around in the
shack, as I don't have to fire up the rack with the Marantz, O scope,
tx audio stuff, r390a, etc.

It would be nice to add a speaker to the homebrew, and a push pull
output, but then I would need a nice built in speaker, which
means a cabinet for the receiver, and I change a plug in coil
to switch between 80 and 40 meters.

Eventually, I may build up a tube receiver audio amp with
many inputs, tone controls, push pull output, line in and outs
for the transmitter and tape deck, etc.

Uh oh! another project!




>     Reading this makes me want to go downstairs and hit the bench.
> Do you have any pictures ?


Yes, get down there and have fun!

I will take some pictures when its done.
I take them to the store and get the digital pictures on a CD
through Kodak...

That is what I did with the push pull 812 rig.

Brett
N2DTS


>
> --... ...--  John
> WAØSTX