[ARC5] OS-8 scope, transistorizing

[J. Forster]

If you can find some headers, like tube bases, it should be easy and cheap
to build your own FETrons these days for a buck or two each.

-John

===============


> There are at least four different NAVSHIPS manuals on at least five
> different OS-8 models.  Plus several Signal Corps manuals.  OS-8E/U, at
> least as
> originally built, has the same tube lineup as OS-8C/U, of which it is a
> minor
> modification.  Over the years, I've heard several rumours of a solid state
> model, but I've never actually seen one.
>
> In a message dated 08/06/2011 13:15:39 PM Central Daylight Time,
> jfor at quikus.com writes:
>>
>> It's also on BAMA.
>>
>> -John
>>
>> ===============
>>
>>
>> >I have the OS-8 manual in DJVUE format if you want it.
>> >Just let me know where to send it.
>> >73's
>> >Greg
>> >WA7LYO
>> >Kinston, NC
>> >----- Original Message -----
>> >From: "jmfranke" <jmfranke at cox.net>
>> >To: "Kludge" <wh7hg.hi at gmail.com>; "'arc5'" <ARC5 at mailman.qth.net>
>> >Sent: Saturday, August 06, 2011 1:00 PM
>> >Subject: [ARC5] OS-8 scope, transistorizing
>> >
>> >
>> >I believe the model OS-8E scope was solid-state, except for the CRT of
>> >course. You might see if there is a manual out in the wide spaces for
>> it.
>> >
>> >John  WA4WDL
>> >
>> >--------------------------------------------------
>> >From: "Kludge" <wh7hg.hi at gmail.com>
>> >Sent: Saturday, August 06, 2011 12:20 PM
>> >To: "'arc5'" <ARC5 at mailman.qth.net>
>> >Subject: Re: [ARC5] BC-453 Mods
>> >
>> >>-----Original Message-----
>> >>From: arc5-bounces at mailman.qth.net
>> [mailto:arc5-bounces at mailman.qth.net]
>> >>On
>> >>Behalf Of neilb at ihug.co.nz
>> >>>I think you are referring to the device known as the  FETRON.  I
>> first
>> >>became aware of them
>> >>>in about 1980 when my employer began fitting them to communications
>> >>equipment at the
>> >>>plant where I worked here in Auckland.
>> >>
>> >>There are two OS-8/U scopes in storage here awaiting overhaul which
>> >>could
>> >>definitely benefit from these.  When I went over them to see what they
>> >>needed, one thing I noticed was the heat damage inside from the tubes
>> >>combined with the lack of air &ventilation.  While an article exists
>> >>regarding improvements to the scope that includes installing a fan,
>> I'd
>> >>really rather not do that.  FETRONs or something of that order seem to
>> >>be
>> >>the optimal solution albeit one I can afford by the same definition
>> >>under
>> >>which I can afford even a barely recognizable KWM-2A - i.e., not at
>> all.
>> >>
>> >>Best regards,
>> >>
>> >>Michael, WH7HG ex-K3MXO, ex-KN3MXO, WPE3ARS, BL01xh ex-Mensa A&P PP
>> BGI
>>
>
> Robert & Susan Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
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