[Boatanchors] BC-1004

[Al Parker]

hi agn Phil,
    As I'm sure you are aware, the BC-1004 is pretty much the same as the
BC-779, -774, and R-129, (SP-200 series) except for band coverage.
Probably closest to the BC-779 where it's only different in the lowest 2
bands' freq. coverage, 540 - 1160kc, and 1160 - 2500kc for the 1004 vs
100 - 200kc and 200 -400kc in the 779.
    They're covered in T.O. 31R1-3BC779-1  (TM11-866), which is avaliable
for free download on The Hammarlund Historian website's "Manual" section.
(thanks to John, K5MO, for the scanning chores)
    There's also a reburbishment page on the BC-779 in the "Service"
section.  I don't remember any particular "gotchas" in it, but all the
paper caps will need to be replaced, and check the bleeder/dropping
resistors in teh power supply.  It is a very nice operating receiver when
done.
http://www.hammarlund.info
    I don't know why there might be a reason to change the HFO from a 6J7
to a 6C4 other than to update or go miniature.  There was a long article
in QST back in the 50's or early 60's that went thru a complete re-tube
and redesign to "modernize" these rcvrs.  THat may be where the swap came
from.  I have a copy, & can send you a copy it you'd like.  I don't think
it's on the website due to copyright worries.
    We'll all be interested in the account of your progress as you get
into it.
73,
Al, W8UT
New Bern, NC
BoatAnchors appreciated here
http://www.thecompendium.net/radio/
http://www.hammarlund.info


----- Original Message ----- 
From: "Philip B Atchley" <ko6bb at juno.com>
To: <boatanchors at mailman.qth.net>
Sent: Wednesday, August 18, 2004 11:02 PM
Subject: [Boatanchors] BC-1004


> Hi All,
> The owner picked up his overhauled R-100/URR today and dropped off a
> BC-1004 for a re-cap and general servicing.  It looks like an
interesting
> old radio, the power supply is nearly as big as the receiver and is
> considerably heavier!  It must have been made when the price of iron was
> down ;-)  This is NOT the set you'd want to use as a backpack rig for
> field day.
>
> For some reason somebody made a socket adapter and replaced the HFO
VT-90
> tube (Pentode?) with a 6C4 7 pinner.  Not sure why that was done, but it
> looks like it won't be too hard to reverse it.
>
> Any "Gotcha's" on this set?
>
> 73 from the "Beaconeers Lair".
> Phil, KO6BB
>
> Where DX begins at the noise floor!
> Merced, Central California, 37.3N  120.48W  CM97sh
>