Fw: Re: [HBR] Radio design advice

[JACK MC*ALISTER]

Being new to the thread, where can I find some junkers to scavenge?

Jack B. "gunny" McAlister
KE7FMD gunny1960 at msn.com
WA7034SWL

Arizona is a wonderful state with great weather!





>From: windy10605 at juno.com
>Reply-To: HBR Receiver List <hbr at mailman.qth.net>
>To: hbr at mailman.qth.net
>Subject: Fw: Re: [HBR] Radio design advice
>Date: Wed, 31 May 2006 13:18:29 -0500
>
>That's what I like about this group ....present some good ideas and come
>away with better ideas. I had forgotten that I wanted to try a Pullen
>mixer at the next opportunity and this is it. Also the use of Heathkit
>HW/SBxxx parts of a junker (plenty out there) has been expanded. So where
>I'm at now with the HetroGen-X :
>
>1) Tuned preselector for 160/80/40/30m with plug-in coils, ceramic
>socket, drop 80/40m band imaging in favor of 3995Khz IF
>2) 6" x 8" x 2" chassis, painted grey hammertone, decal, ........like
>GB-1
>3) HW/SBxxx 6AU6 Osc, 3" x 3-1/2", 36:1 tuning rate dual Jackson Bros
>drives, sunk dial
>4) 6SN7 Pullen Mixer, feeding ......
>5) Heathkit 3995Khz Crystal SSB/CW filter, feeding......
>6) 6S-?-7 fixed tuned 3995Kz regenerative detector (no BFO required, use
>regen to compensate for the filter loss)
>7) 6SN7  for 2 stages of audio which should be good for headphones or a
>small speaker.
>
>Comments ? It's no HBR-xy but the idea is to make a really simple, but
>effective, parts available today, tube receiver using octals (if you can)
>to match the GB-1 Transmitter which uses a 6V6/6L6 on a 6x8x2 open
>chassis.
>
>73 Kees K5BCQ
>
>
>
>--------- Forwarded message ----------
>From: N2EY at aol.com
>To: hbr at mailman.qth.net
>Date: Tue, 30 May 2006 21:00:50 EDT
>Subject: Re: [HBR] Radio design advice
>Message-ID: <3ba.2fb81d3.31ae44c2 at aol.com>
>
>In a message dated 5/30/06 1:20:41 PM Eastern Daylight Time,
>windy10605 at juno.com writes:
>
>
> > What I've come up with as the best alternative so far is something like
> > the Simple-X receiver of the early 60s handbook using a tuned
>preselector
> > covering both 40/80m (pluggable coil), a  Heathkit HW/SBxxx VFO for
> > tuning 5-5.5Mhz (36:1 vernier), both feeding a mixer with audio derived
> > AVC ? Mixer output is a tuned 1843Khz IF coil with a 1843Khz crystal
> > filter (cheap), driving a regenerative detector (no BFO required), and
> > that drives 2 stages of audio.
> >
>
>6SL7 or 6SN7 Pullen mixer
>6SL7 or 6SN7 oscillator/buffer a la W2YM, with Command set tuning cap
>Xtal filter
>6SK7 IF
>6SA7 product detector/BFO
>6SL7 or 6SN7 audio (2 stages)
>
>6J5 is equivalent to 1/2 6SN7. 6C5 may be close to 1/2 6SL7. 12 volt
>heater
>tubes can be used as well.
>
>If Pullen mixer is not wanted, use 6SA7 or 6SB7 pentagrid (6SB7
>preferred).
>If W2YM VFO is not wanted, use 6SK7 in Hartley circuit.
>
>The Heath LMO does not have a built-in vernier - the basic LMO module
>takes 5
>turns to cover 500 kHz - way too fast. They're also not the easiest thing
>to
>find without buying the whole rig, and you wind up with a lot of
>metalwork.
>
>The easiest way to use the ARC-5 tuning capacitor is to use it in a
>cut-down
>transmitter chassis. There was an article in CQ called "A Low-Cost VFO"
>by
>W2EWP that gives the mechanical details. The article also appears in the
>"Command
>Sets" book which is free for the download from pmillet's site IIRC.
>
>You need a BC-457 or BC-458, but only the VFO part and the tuning caps
>need
>be intact.
>
>73 de Jim, N2EY
>************************************
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>construction notes...... via http://www.qsl.net/k5bcq/
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>
>
>Retrieve reflector archived data via
>http://mailman.qth.net/mailman/listinfo/hbr
>************************************
>Visit the HBR Receiver Web Site with over 100 pictures of receivers and
>construction notes...... via http://www.qsl.net/k5bcq/
>there is also a mirror (faster response)at http://k5bcq.edebris.com/
>
>
>Retrieve reflector archived data via 
>http://mailman.qth.net/mailman/listinfo/hbr
>