"Tim Wescott" wrote in message
...
On Fri, 06 Mar 2009 09:04:58 -0600, SX-25 wrote:
I've got a receiver that has no identifiable markings and
I wonder if
anyone can assist me in learning what it is?
The receiver can be viewed at
http://img.villagephotos.com/imageview.aspx?i=24536290
It is 10-inches wide, 8-inches deep and 8-inches
high.
It contains two tubes and I presume it to be a
regenerative. The
two
tubes are a 6J5 and a 6J7. Since the receiver has such
a cloak of mystery surrounding it, I have no way of
knowing if
those
were original tubes or substitutions. The 6J5 may
very well have been a substitute for an original
6C5. The 6J7 may
have
been a substitute for a 6W7.
At first I believed the receiver to be a derivation
of either a
National SW series or possible a homebrew Frank Jones
regen. However
the die cut of the cabinet and extrusions are too
professional to
be a
homebrew nor does the wiring job underneath suggest a
factory
made unit.
The two pointer knobs were on the receiver when I
bought it
although,
to me anyway...they look too modern for the rest of
the vintage of the receiver. Band is selected with a
plug in coil.
The
coil that was included was homebrewed and without
marking.
The style, circuit and tube choice suggests a
vintage of very late
1920s or 1930s era.
If any of you have any ideas or guesses I would
welcome them.
Thanks.
WA9VLK
No markings, the cabinet's way bigger than the chassis,
the chassis
doesn't match up all the way to the hole in the cabinet,
the coil's
homebrew.
I'd say it's a reasonably well built home-brewed receiver
in a commercial
cabinet. Those particular tubes have been available since
the late
'30's, so there's no reason for them not to be original.
Who knows about
the chicken-head knobs -- the original owner may have put
them on,
someone may have bought it second hand sans knobs or felt
that the
original builder's knobs were ugly, etc.
--
http://www.wescottdesign.com
The main dial is a standard National Velvet Vernier,
type B, the other knobs are all standard pointer type knobs
of a late version. National built the VV dial from some time
in the mid 1930s until the 1950s. If the octal tube sockets
are original its likely to date from the 1940s or later. I
also vote for a home-brew set, perhaps based on the National
SW-3.
--
--
Richard Knoppow
Los Angeles
WB6KBL