[ARC5] BC-348

[John P Hutchins]

You know it was WWII?  If Paper 0.01 was not available/short  on the line I
am sure  mica could have been sub'ed ?
but the paper in many cases could be still be good depending on the
"storage" environment.

On Mon, Dec 30, 2019 at 3:02 PM <hwhall at compuserve.com> wrote:

> Weren't BC348s made by more than one manufacturer that may have sourced
> parts from more than one maker?  If so, I guess I wouldn't personally say
> the .01s in BC348 are all paper.  I don't know it for sure one way or the
> other, so I check them individually.
>
> Wayne
> WB4OGM
>
> -----Original Message-----
> From: J Mcvey via ARC5 <arc5 at mailman.qth.net>
> To: whitebear1122 <whitebear1122 at comcast.net>; arc5 <arc5 at mailman.qth.net>;
> hwhall <hwhall at compuserve.com>
> Sent: Mon, Dec 30, 2019 12:31 pm
> Subject: Re: [ARC5] BC-348
>
> I don't remember large micas in the BC348 radio, but I may be wrong...
> Yes there .005 uf micas and larger in the world , and I did say
> "generally".
> Yes, when in doubt, check the parts list for details.
> Can we agree that the .01 uf caps in the BC348 are paper?
>
>
> On Monday, December 30, 2019, 2:15:36 PM EST, <hwhall at compuserve.com>
> wrote:
>
>
> I check them all. Then again, I try to check everything on 70-yr old sets
> before thinking of applying power.  There's an informed opinion that
> everything above particular values is paper & bad, and anything below is
> mica & okay.  But I've noted that in original parts lists for RBM sets I
> have, small picofarad caps are specified as PAPER!  And some of the caps in
> larger values (~.005uF) are real micas.
>
> Wayne
> WB4OGM
>
> -----Original Message-----
> From: Whitebear1122 <whitebear1122 at comcast.net>
> To: arc5 <arc5 at mailman.qth.net>
> Sent: Mon, Dec 30, 2019 10:43 am
> Subject: [ARC5] BC-348
>
> I’m contemplating the next project to take on and I’m leaning towards
> restoring my BC-348.  I bought it many years ago at a swap meet for $80 and
> set it on the shelf.  It eventually migrated to the back of the shelf and
> out of sight.  Other than some scraps and scratches on the cabinet, it
> looks new and unmodified.  No modifications inside or out.
>
> It also has the dynamotor installed. I can’t imagine the dynamotor turns
> so I won’t bother firing it up before tearing it apart and relubricating
> it.  I have the matching shock mount with the Jones power plug too,
> acquired separately.
>
> I’ll set it on the bench today and take another look inside.  I did a
> GOOGLE search and came up with at least 3 excellent restoration sites so
> that will be a big help.  I see the usual differences in restoration
> techniques where some just shotgun replace the mica caps, while others
> check the caps and only replace what’s bad.  I would prefer to do the check
> and only replace if necessary.
>
> Boy those 348’s are gorgeous.  Does anyone here actually use theirs on the
> ham bands?
>
> 73, Scott WA9WFA
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