[Milsurplus] BC-348-Q restoration

[Dennis Monticelli]

Mark,

Good point regarding 24-2.  Should not trust any cap that could take out
iron.

As for the filament resistors, this set was rewired for 6.3V and I think I
will leave it that way.  Any other resistors to watch out for?

Dennis AE6C

On Mon, Jun 15, 2020 at 8:35 AM Mark K3MSB <mark.k3msb at gmail.com> wrote:

> Hi Dennis
>
> Check the audio plate bypass cap (24-2) so you dont take out the audio
> transformer primary if it's bad.
>
> Check both filament dropping resistors (85, 85).  Mine were way off.
>
> 73 Mark K3MSB
>
> On Mon, Jun 15, 2020, 11:01 AM Dennis Monticelli <
> dennis.monticelli at gmail.com> wrote:
>
>> Hi guys,
>>
>> I am beginning my first BC-348 restoration. Luckily the Q model is the
>> simpler of the two basic types. It appears to have decent caps, not
>> micamol. Not badly hacked either.
>>
>> First order of business has been to remove unwanted mods. That means all
>> other than the AC supply, which fortunately was well executed.  A 1uF
>> bypass cap on the cathode of the 2nd IF has been added.  The stock 0.1uF
>> bypass is still there.  Was this a published mod to change AVC action?
>>
>> Regarding the tuning gearing.  It was stiff and I found dried grease.
>> Was any grease used on stock units?  I note the use of brass on steel gear
>> design choices which I recall is naturally lubricating.  What do you
>> recommend regarding cleaning and possible lube of the gears?  I am using
>> WD-40 on Q-tips to clean off the old lube.
>>
>> Any other restoration hints would be appreciated.
>>
>> Dennis AE6C
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20200615/ed0ca69d/attachment.html>