[Hammarlund] I count 8 BBoD's

[Cecil Acuff]

Hi Al,

        That's the best explanation I have heard for how my VLF came out the
way it did....I would bet they built the RF decks on another line...I guess
I always assumed they made one radio at a time from top to bottom...(or
bottom to top)

I have seen some vintage pictures of an R-390A assembly/burn in area ...it
sure would be nice to see some pictures of an SP-600 line!

Cecil...
----- Original Message ----- 
From: "Al Parker" <anchor@ec.rr.com>
To: <hammarlund@mailman.qth.net>; "Phil Atchley" <k06bb@elite.net>
Sent: Monday, June 02, 2003 4:00 PM
Subject: Re: [Hammarlund] I count 8 BBoD's


> Hi Phil,
>     Well, I wasn't correct when I said they did them all.
> Cecil said to me:
> =============
> "        I must have gotten the exception...I picked up an SP-600 VLF
> recently and was real proud that it had ceramic disc caps every where I
> looked under the bottom side and in the cans.  Took a peek inside the RF
> deck and low an behold it's full of Black Beauties...
>     The ceramics are factory...way too nice a job...things don't even look
> disturbed on the bottom side.
>     Can't figure out for the life of me why they would go to the trouble
to
> put
> the ceramics in the thing and not do the RF deck....of course they didn't
> know back then how much trouble the BBoD caps would turn out to be...Maybe
> they performed better when new than the ceramics...who knows!"
> =============
>     I would have offered the following to explain that, but maybe there's
> more to it:
>     The -JX-17 manual does state that some rcvrs did have discs, and it's
> been shown that (I think) that somewhere in the 16000 sn's that they used
> them.  Perhaps they had some RF decks already made up with BBOD's and used
> them on the chassis that they uses discs in.
>     All the ones I've seen (about 4) with discs had no BBOD's anywhere.
>     But, it now looks like they did some mix/match jobs.
>     Maybe the Hammarlund Historian, who has a much better memory than I,
> will jump in here.  Les??
> 73,
> Al, W8UT
> New Bern, NC
> BoatAnchors appreciated here
> http://www.thecompendium.net/radio/
> http://www.hammarlund.info
>
>
> ----- Original Message -----
> From: "Phil Atchley" <k06bb@elite.net>
> To: "Al Parker" <anchor@ec.rr.com>; <hammarlund@mailman.qth.net>
> Sent: Monday, June 02, 2003 3:45 PM
> Subject: Re: [Hammarlund] I count 8 BBoD's
>
>
> > Al et al.
> > I double checked. All the ceramic disk capacitors look to be part of the
> > original build, and there are only 8 BBoD's in the main chassis.
> Naturally
> > I'll look in every nook and cranny as I go through it.  It appears this
> set
> > may have been built during the changeover to ceramics or something as
> "most"
> > of the bypass capacitors etc are ceramic.  It's S/N 13821.
> > 73 de Phil  KO6BB
> >
> > > Hi Phil,
> > >     It sounds like somebody's been in there & replaced some BBOD's.
> When
> > > the factory ussed discs, they used them everywhere.  If you've got a
> small
> > > dentists' type mirror you can get a look into the RF deck &avoid the
> > misery
> > > of removing/replacing if you don't have to.  (watch for the hidden one
> in
> > > the pod under the RF deck conx.)
> > > 73,
> > > Al, W8UT
> > >
> > >
> > > > Hi.
> > > > In this SP600 I'm working on I counted 8 BBoD's, primarily in the IF
> > > > section.  Of course this doesn't include any that 'may' be lurking
in
> > the
> > > RF
> > > > compartment.  Naturally they will be replaced, as do ALL paper
> > capacitors
> > > > and 'lytics of any variety that are lurking in ANY BA gear that
comes
> > > > through this QTH.  Some folks have told me that's overkill but the
> > > ultimate
> > > > performance and reliability has proved worthwhile.
> > > >
> > > > 73 de Phil, KO6BB
>
>
>
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