[HBR] Yet Another HB Receiver Project

[Eddy Swynar]

HI WALT...

MANY THANKS FOR YOUR NOTE, & FOR YOUR INTEREST...SEEMS THERE ISN'T EXACTLY A
HUGE THRONG OF AMATEURS OUT THERE LINING UP TO CONSTRUCT 1929-STYLE
SUPERHETS! HI HI

> Eddy Swynar wrote:
>
> > It's an 11-tube 1929-style superhet, as was inspired by TJ Lindsay's
> > piece in the Antique Wireless Association's OLD TIMER'S BULLETIN of
> > about a year ago...there ARE differences, however.
>
> Very cool project, not to say challenging, with the availability of parts
> being as it is.   I'd certainly like to hear how it goes and see some
> pictures.  What are you using for a chassis?


I HAVE TWO JUNQUE-BOX CHASSIS THAT I'M GOING TO BOLT TOGETHER, SIDE-BY-SIDE,
TO ACT AS A SINGLE CHASSIS IN FINISHED FORM: THIS WILL PROVIDE A  COMPLETED
"PLATFORM" THAT'LL BE 16" WIDE BY 16" DEEP. THE "HEIGHT" OF THE ASSEMBLY IS
2"---A STANDARD 19" RACK MOUNT STYLE FRONT PLATE WILL HOLD THE DIAL, CONTROL
KNOBS, ETC.

 >
> As for the filaments, I'd think some of the AM boys would have a
> good size 5 VAC CT transformer squirrelled away somewhere --
> some of the serious 'heavy iron' tubes have 5V filaments.   17 amps
> ... wow ...  But that's a 5V 10A CT transformer -- I think that's not all
> that rare an item.


MY SUPPLY OF SUCH LOW VOLTAGE TRANSFORMERS TURNED OUT TO BE GREATER THAN I
FIRST THOUGHT! SHOULDN'T BE A PROBLEM---ONLY THING IS, THE CHASSIS IS TOO
SHALLOW TO "HIDE" THE TRANSFORMERS BELOW DECKS!


>
> Commercial receivers of that vintage most often used separate power
> supplies, did they not?


FOR THE MOST PART, TRUE---BUT I WANTED SOMETHING COMPLETELY SELF-CONTAINED
FOR A CHANGE, AT THE RISK OF AC-INDUCED HUM ON THE FINAL AUDIO.

>
> My (much easier!) 10 tube project is going well -- the audio stages
> are working.   Detector next, possibly today.   That and the AGC are
> the last of the messy (many components per stage) work.   Both are
> plate detectors.


CONGRATULATIONS! SOUNDS LIKE YOU'RE GOING GREAT GUNS ON IT---GOOD FOR YOU!


>
> There will be an Electric Radio article on either this or the HBR2K
> project -- maybe both.   I enjoyed writing for ER, but life got so busy
> for a while there that there was no way to add writing and still have
> time for any radio activity to write about!


I LOOK FORWARD TO THE POSSIBILITY OF READING BOTH, WALT---THE READERSHIP
HERE WHO ARE FAMILIAR WITH YOUR PAST EFFORTS SHALL HOLD YOU TO IT!
(CERTAINLY *I* WILL, HI HI)...MANY THANKS IN ADVANCE!

~73!~ EDDY VE3CUI - VE3XZ

>
> Walt
> KJ4KV
>
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>
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