[ARC5] Crawfishing: BC-375 on 30 Meters

[Geoff]

Designed by GE for GE mobile VHF FM 2 way transceivers. Anything to prevent 
customers buying RCA 6146's!

They often have a short service life in that use with long winded 
transmissions and poorly adjusted antennas.

Carl


----- Original Message ----- 
From: "Ian Wilson" <ianmwilson73 at gmail.com>
To: "David Stinson" <arc5 at ix.netcom.com>
Cc: "ARC-5 List" <arc5 at mailman.qth.net>
Sent: Thursday, October 31, 2013 10:36 AM
Subject: Re: [ARC5] Crawfishing: BC-375 on 30 Meters


> Assuming you mean the 7984: great tube and sockets are readily
> available with a little patience. I used one to put boots on a 40m
> Rockmite (>35W out for 500mW in).
>
> For some reason the 6146 leaves me cold although I have seen
> the 7984 described as a Compactron 6146.
>
> 73, ian K3IMW
>
>
> On Thu, Oct 31, 2013 at 3:51 AM, David Stinson <arc5 at ix.netcom.com> wrote:
>
>> Well, I'll have to call "hold up" on the BC-375 on 30 meters.
>> After doing several other "tinkers," I've been unable to replicate the
>> success against thermal drift. The drift is back on 30 and 40 meters.
>> Don't yet know why.
>>
>> The rig is still stable on 160 and 80.
>> I'm going to focus on finding the best substitute tubes for now and get
>> back to the 30-40 drift problem later.
>> 813 will not fit in the available space (socket mods not allowed).
>> 811/812 will fit but requires regulating the filament voltage down.
>> Will order an 8 Amp DC-DC buck module for that.
>> Going to try some 7894s, which are very cheap and have the right fil.
>> rating.
>> 73 DE Dave AB5S
>>
>>
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