[HBR] "HBR-15" for sale

[john]

It's one of the reasons to ALWAYS provide a path to station ground, and not 
trust the 3rd wire...
:-)
John


At 11:31 AM 8/11/2005, you wrote:
>Hi,  since the subject of fused plugs was brought up... An experienced radio
>type pointed out to me that the double-fused plug circa 50's and 60's is
>death waiting to happen.  It took me some thinking to figure out why.  The
>problem is that one of the fuses in the ground leg.  If it blows for
>whatever reason,  the hot side of the line is still connected to whatever is
>wrong and if it's left the chassis hot then the opportunity for you to
>ground the set through your body exists.  He admonished me to throw such
>double-fused plugs in the garbage.  I built my 1960's 40/80 meter set with
>the double-fused plug  called right out of the ARRL Handbook so there was
>some nostalgia about keeping it.  I made it into a shorting jumper for one
>of the light bulb sockets on my variac supply,  where it can do no harm.
>Since becoming aware of this hazard,  I noted many circuits in the handbook
>that used double fusing , with a fuse on each side of the line, a good idea
>to protect gear but a bad idea for  personal safety without a separate,
>non-fused ground to the gear.  I'm gradually putting three prong plugs with
>proper grounding/ hot side fusing on most of my old sets.  For those that
>don't have it,  I resort to an isolation tranformer (not a variac which
>doesn't isolate).  I still like looking at the double-fused plug !  Best
>regards,  Dan
>
>-----Original Message-----
>From: hbr-bounces at mailman.qth.net [mailto:hbr-bounces at mailman.qth.net] On
>Behalf Of David J Windisch
>Sent: Thursday, August 11, 2005 3:25 AM
>To: hbr at mailman.qth.net
>Subject: [HBR] "HBR-15" for sale
>
>Hi, all concerned:
>
>This one was on ebay a while ago.  Bids didn't get past the reserve, and I
>made an after-auction offer which was accepted.
>
>There was no information on what is inside.
>
>I've gotten as far as turning it on, listening on 40M, and documenting the
>tube lineup.
>
>Its general form is:
>
>6AK5-6JH8-6JH8-6BJ6 X3-6AQ5, with l-o's, bfo, detectors, agc-amps, S-meter
>circuitry.  The r-f stage has separate peaking.  The 1st-lo is tuned by a
>smooooooth National PW-type drive The second i-f has provisions for 2
>switched 9-pin plug-in-style mechanical filters and a "wide" position.
>  Sri -- the filters are long gone.   Power supply is internal, with a couple
>
>of 0B2's.  Line cord has one of those fused plugs which purist-collectors
>drool over.   I don't have a pic of the bottom side; howevewr, it's nicely
>homebrewed.
>
>Date codes on the tubes are '50s and '60s.  All but two of the shields are
>those nice ones with  dissipators inside.
>
>There are 5-pin plug-in coils for 80-10M, and extra BUD ceramic forms, in a
>box.
>
>Physically, it is H9"XW12" with tilt built in to the design, and 18" deep.
>It weighs around 30 lb.
>
>I have the ebay jpg's, which, if I knew how to make into binaries, I could
>post on alt.binaries.pictures.radio .   They can be emailed to interested
>parties.
>
>My original intent was to find an "HBT-XX" homebrew transmitter to go with
>it, and the intent has fallen by the wayside.   Oh, well . . .
>
>So . . . take advantage of my indolence.  Make me an offer I can't refuse.
>Include about $40 for insured-ground shipping to conus.
>
>73, and tks for reading.
>
>
>
>
>************************************
>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
>
>
>
>************************************
>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
>
>
>
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