Eddy,
Glad you got it going!
I would also like to see pictures of it, maybe send it into
electric radio mag.
B+W coil stock is expensive, so you want to go too large there, hand wound
coils are better, at least you can rewind them if you go to far.
Where did you find the English dial?
Where did you get the design?
What does it use for a filter?
Enjoy!
Brett
N2DTS
>
> Hi All,
>
> Well, I am VERY happy to say that my homebrewed 12-tube 1929
> superheterodyne
> receiver project IS WORKING!!!!!!
>
> I gave it the "maiden run" test voyage this morning---some problems
> ('natch!): an open plate choke, a bad solder connection on a
> bypass cap, and
> not enough (and later too much!) coupling between the local
> oscillator & the
> detector...the usual little stuff.
>
> I still have to determine how many turns of the local
> oscillator coil I'll
> have to short out in order to make it tune the 80-meter band
> (right now it
> tunes from about 3.3 to 3.490-MHz---but I was wise enough
> from the get-go to
> employ more coil stock turns than needed, "...just in case".
> It's always
> easier to SHORT turns, rather than to try & ADD them later
> on, after the
> fact!).
>
> It purrs along every bit as loud as my FT-980 along side it
> (the rice rocket
> is relegated to the role of digital frequency meter for these
> particular
> tests). Signals definitely peak right up with the two pre-selector
> capacitors (yup, it's a knob twiddler's delight!), & the old
> British vernier
> dial assembly is as smooth as silk---BETTER than anything
> encountered from
> either National, or Millen, surprisingly enough...
>
> Surprised, too, by the absence of hum, & IF feedback in the
> thing---either
> I'm really lucky, or I've managed to learn a trick or two in
> these matters
> after homebrewing for some 32 years now. :>)
>
> The whole package LOOKS real sexy, too---with any luck, I may
> be able to
> borrow a digital camera this weekend...if anyone cares to,
> I'd be more than
> pleased to e-mail shots of my latest "pride & joy" here to
> them. Just ask!
>
> Now, according to Murphy's law, the darn thing should blow up
> between now &
> the first request for a shot...Hmmmmm.
>
> ~73!~ Eddy VE3CUI - VE3XZ
>
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