[Johnson] Fwd: Viking 1 "gotchas" ?
tbs50a at aol.com
tbs50a at aol.com
Fri Feb 22 11:02:19 EST 2013
-----Original Message-----
From: tbs50a <tbs50a at aol.com>
To: bcarling <bcarling at cfl.rr.com>; burnsguitar <burnsguitar at yahoo.com>; patrick <patrick at ae1pt.com>
Cc: Johnson <Johnson at mailman.qth.net>
Sent: Fri, Feb 22, 2013 10:53 am
Subject: Re: [Johnson] Viking 1 "gotchas" ?
Hi Brian and Bry,
One the V1 a few thinks come to mind. Bry mentioned the final toob.Oringinally it used a 4D32 but at one time they where very expensive is Johnson came up with a mod to use a 829B.The output is a little less abt 85wt vs 120wts. The 4D32 was abt $100 vs $10 for the 829B. In the 1990's a bunch of the 4D32's hit the surplus market at $20.\
Always make sure that you have grid drive to the final before you apply the HV. Originally the V1 didn't have a clamp toob so you can wasted the final.
Three things come to mind on the electronics.The voltage divider resistor R13? 15K 50watts Usually open..When open you won't have screen grid voltage on the mod & final Clean the meter switch really well. And pull out the roller inductor and clean it too.
Bry, On your D-104 I read somewhere that in the cartige there is a diaphragm with a pin in the center of it. That pin has a wax seal on it. Use heat to reflow the wax on to the pin. That should fix your low fq problem. Long time no chat OM.Have been in bed all week with a bum back. If you could say a few words in prayer that would be wonderful!!
GL&GB
Terry N3GTE
-----Original Message-----
From: Bry Carling <bcarling at cfl.rr.com>
To: 'Brian Burns' <burnsguitar at yahoo.com>; Patrick Thrush <patrick at ae1pt.com>
Cc: Johnson <Johnson at mailman.qth.net>
Sent: Fri, Feb 22, 2013 6:36 am
Subject: Re: [Johnson] Viking 1 "gotchas" ?
Brian and Patrick,
That should be interesting. I have a Viking II ready for rehab and am about to
acquire
a second one. Since nobody seems to want these any more, I plan to keep them
and put the best one on the air. First I will repair and personalize it. Thanks
for the
tip about Mouser.
I have a D104 but it sounds like someone has possibly put a cheap, tinny
sounding cartridge
in it. At least - I put it into my guitar amplifier and there seemed to be very
little of the bottom
end that I normally hear out of a D104, and the output seemed low. This mic came
with a
repainted base that looked scruffy, although the mic head looks OK. The cable is
not original
and there was no plug on it. All bad signs (grin!)
I wonder where I would find a replacement cartridge that sounds just like a D104
these days.
I will let you guys know how it come slaong with the restoration on these rigs.
What final tube does the Viking use? A 4D32 isn't it? I think my Viking II uses
a pair of 6146s.
This has been on the back burner for a few weeks, but will not stay there. I
will probably sell
the Globe Scout 680A to make room for this Viking II in the shack.
73 de AF4K, Bry
On 22 Feb 2013 at 1:44, Patrick Thrush wrote:
From: "Patrick Thrush" <patrick at ae1pt.com>
To: "'Brian Burns'" <burnsguitar at yahoo.com>
Date sent: Fri, 22 Feb 2013 01:44:51 -0500
Copies to: Johnson at mailman.qth.net
Subject: Re: [Johnson] Viking 1 "gotchas" ?
> Gotcha's? There are always those. Plan on a recap of all the paper
> and
> electrolytic capacitors. Digikey is your friend. Measure any
> resistor over
> 100K. Many will have moved beyond tolerance and replace. Google
> your
> rig--there is a lot of info--and suggested fixes. Do the ones that
> are
> factory service release specified first. You will benefit.
>
> The fun is making this rig yours--and this happens by rehabbing the
> rig and
> learning its wiring, circuit design, and mechanical architecture.
> There is
> nothing better than when it is all aligned and done that you make a
> nice QSO
> knowing that you know that you know your rig--and that it is your
> handiwork
> that made it possible!
>
> 73,
>
> Patrick Thrush, AE1PT
> Bath, NY
> http://www.qrz.com/db/AE1PT
> 42.333 -77.309 CQZ 5 FN12ih
> SKCC #4473
> Keuka Lake Amateur Radio Association
> ARRL, ARRL VE
>
>
> -----Original Message-----
> From: johnson-bounces at mailman.qth.net
> [mailto:johnson-bounces at mailman.qth.net] On Behalf Of Brian Burns
> Sent: Thursday, February 21, 2013 9:17 PM
> To: Johnson reflector
> Subject: [Johnson] Viking 1 "gotchas" ?
>
> Hello All,
>
> It looks like I might be acquiring a Viking 1 in "restore-able"
> condition.
> Just wanted to check to see if there are any "gotchas" before I take
> on the
> project, like unobtainable replacement parts, or whatever.
>
> Cheers,
>
> Brian Burns Ex: W5BRO, K6UCD
>
>
> See my website: http://www.lessonsinlutherie.com
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