[R-390] Re: R-390 Digest, Vol 3, Issue 2
Walter Schulz
k3oqf at localnet.com
Fri Jul 2 11:29:46 EDT 2004
Hi Drew,
Thanks for the good information. Would appreciate the info on the AC current
regulator when you have a chance to Email it to me. Thanks again for all the
help.
73s
Walter
----- Original Message -----
From: <r-390-request at mailman.qth.net>
To: <r-390 at mailman.qth.net>
Sent: Friday, July 02, 2004 4:01 AM
Subject: R-390 Digest, Vol 3, Issue 2
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> Today's Topics:
>
> 1. Re: Help, Looking for Ballast Tube (Roy Morgan)
> 2. Ballastubes (Drew Papanek)
> 3. Re: Ballastubes (Barry Hauser)
> 4. Re: Ballastubes (Rbethman)
> 5. RE: Ballastubes (David Wise)
> 6. T-195 meters/specs needed (Norm - WA3KEY)
> 7. Re: T-195 meters/specs needed (Jim Brannigan)
> 8. Re: T-195 meters/specs needed (Paul H. Anderson)
> 9. RE: T-195 meters/specs needed (Don Reaves W5OR)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 01 Jul 2004 11:57:20 -0400
> From: Roy Morgan <roy.morgan at nist.gov>
> Subject: Re: [R-390] Help, Looking for Ballast Tube
> To: "KC8OPP Roger S." <kc8opp at yahoo.com>, Walter Schulz
> <k3oqf at localnet.com>
> Cc: R-390 at mailman.qth.net
> Message-ID: <5.1.1.5.2.20040701115544.023e6318 at mailserver.nist.gov>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> Ballast Wanters,
>
> The below mod is fine, but if you put the jumpers on the 12BH7 (and mark
it
> well) then the radio is not changed at all.
>
> Roy
>
>
> At 11:41 AM 6/30/2004 -0700, KC8OPP Roger S. wrote:
> >Here is the link and the text about the 3TF7 sub.
> >
> >http://www.r-390a.us/R-390A_Modifications.htm
> >
> >3TF7 Substitution Mod: (optional, recommended) Add
> >jumpers on RT510 between pin 7 and pin 5, and between
> >pin 2 and pin 4. This allows you to later substitute
> >a 12BH7A tube in place of your 3TF7 if (when) it ever
> >fails. (HSN issue 10, pages 1&2 or HSN reprints, page
> >1)
>
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
> 7130 Panorama Drive, Derwood MD 20855
> Home: 301-330-8828 Work: Voice: 301-975-3254, Fax: 301-948-6213
> roy.morgan at nist.gov --
>
>
>
> ------------------------------
>
> Message: 2
> Date: Thu, 01 Jul 2004 13:04:43 -0400
> From: "Drew Papanek" <drewmaster813 at hotmail.com>
> Subject: [R-390] Ballastubes
> To: r-390 at mailman.qth.net
> Message-ID: <BAY17-F42JM1bDGxkHK0007a0dd at hotmail.com>
> Content-Type: text/plain; format=flowed
>
>
> Walter Schulz <k3oqf at localnet.com> wrote:
>
> >Does anybody know where I can find Ballast tubes for my R-390A/URR? Sure
> >would appreciate any >advice on this.
>
> Walter,
>
> You've by now seen the high price quotations for the 3TF7 ballastube,
making
> modifications to
> replace that tube attractive.
>
> I suggest you go to r-390a.net. Click on references, Pearls of Wisdom.
> There you will find a wealth of information (and controversy!) regarding
> that R-390x topic and others, all gleaned from this forum over the years.
> Thanks go to Wei-i Li for his untiring compilation efforts!
>
> I personally like and use the "Two 12BA6 and a paperclip" mod whereby the
> 6BA6's used in PTO and BFO are replaced with 12BA6's and then the
ballastube
> socket is jumpered out (a piece of paperclip
> works well). The mod is extremely simple, inherently reversible, and
> dissipates less heat than the
> various modifications or even the stock configuration.
>
> One mod mentioned is Dr. Jerry's simple AC current regulator. I can
e-mail
> you the schematic and notes.
>
> Drew
>
> _________________________________________________________________
> Make the most of your family vacation with tips from the MSN Family Travel
> Guide! http://dollar.msn.com
>
>
>
> ------------------------------
>
> Message: 3
> Date: Thu, 01 Jul 2004 14:44:49 -0400
> From: Barry Hauser <barry at hausernet.com>
> Subject: Re: [R-390] Ballastubes
> To: Drew Papanek <drewmaster813 at hotmail.com>, r-390 at mailman.qth.net
> Message-ID: <006701c45f9b$7dd04fb0$6d0aa8c0 at V2Premiere>
> Content-Type: text/plain; charset=iso-8859-1
>
> A caution on the paperclip thing ...
>
> I have recently found that some chrome paper clips are not exactly
> conductive out of the box. Apparently they're covered with some other
kind
> of silvery finish or chromed then clear coated. I'm in the habit of using
> jumbo paper clips to make temporary test connections as they are of a
> convenient diameter. Came across this recently. Thought the radio was
> dead -- nope -- defective paper clip. Check first with an ohmmeter. I
> found some could be scraped and then made the connections. Just don't
> assume zero ohms -- or infinity either.
>
> Barry
>
> ----- Original Message -----
> From: "Drew Papanek" <drewmaster813 at hotmail.com>
> To: <r-390 at mailman.qth.net>
> Sent: Thursday, July 01, 2004 1:04 PM
> Subject: [R-390] Ballastubes
>
>
> >
> > Walter Schulz <k3oqf at localnet.com> wrote:
> >
> > >Does anybody know where I can find Ballast tubes for my R-390A/URR?
Sure
> > >would appreciate any >advice on this.
> >
> > Walter,
> >
> > You've by now seen the high price quotations for the 3TF7 ballastube,
> making
> > modifications to
> > replace that tube attractive.
> >
> > I suggest you go to r-390a.net. Click on references, Pearls of Wisdom.
> > There you will find a wealth of information (and controversy!)
regarding
> > that R-390x topic and others, all gleaned from this forum over the
years.
> > Thanks go to Wei-i Li for his untiring compilation efforts!
> >
> > I personally like and use the "Two 12BA6 and a paperclip" mod whereby
the
> > 6BA6's used in PTO and BFO are replaced with 12BA6's and then the
> ballastube
> > socket is jumpered out (a piece of paperclip
> > works well). The mod is extremely simple, inherently reversible, and
> > dissipates less heat than the
> > various modifications or even the stock configuration.
> >
> > One mod mentioned is Dr. Jerry's simple AC current regulator. I can
> e-mail
> > you the schematic and notes.
> >
> > Drew
> >
> > _________________________________________________________________
> > Make the most of your family vacation with tips from the MSN Family
Travel
> > Guide! http://dollar.msn.com
> >
> > _______________________________________________
> > R-390 mailing list
> > R-390 at mailman.qth.net
> > http://mailman.qth.net/mailman/listinfo/r-390
> >
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Thu, 01 Jul 2004 15:08:50 -0400
> From: Rbethman <rbethman at comcast.net>
> Subject: Re: [R-390] Ballastubes
> To: R-390 at mailman.qth.net
> Message-ID: <40E46142.8030009 at comcast.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Group,
>
> Probably a LOT wiser to simply use bare copper solid wire.
>
> Don't know what resistance properties in the varied chrome processes.
>
> I've been chewing over doing this and saving my ballast tubes for
> whenever they (The R-390As AND I) finally leave THIS QTH.
>
> Bob - N0DGN
>
> Barry Hauser wrote:
>
> >A caution on the paperclip thing ...
> >
> >I have recently found that some chrome paper clips are not exactly
> >conductive out of the box. Apparently they're covered with some other
kind
> >of silvery finish or chromed then clear coated. I'm in the habit of using
> >jumbo paper clips to make temporary test connections as they are of a
> >convenient diameter. Came across this recently. Thought the radio was
> >dead -- nope -- defective paper clip. Check first with an ohmmeter. I
> >found some could be scraped and then made the connections. Just don't
> >assume zero ohms -- or infinity either.
> >
> >Barry
> >
> >
> >
> < Bob Bethman - N0DGN
> +-------------------------------+----------------------------------+
> | N0DGN AMRadio Manassas, VA | REAL Tube Radio and AM |
> +-------------------------------+----------------------------------+
> | Manassas Radio - Home of Homemade Kielbasa & Pirogi |
> +-------------------------------+----------------------------------+
> | Bob Bethman \\\|/// " The absence of a danger |
> | rbethman(at)comcast.net \\ ~ ~ // signal does *NOT* mean |
> | (/ @ @ /) that everything is OK " |
> +-------------------------oOOo-(_)-oOOo----------------------------+
> | <http://home.comcast.net/~rbethman> |
> | 1 BC-610I w/BC-614I,1 T-213/GRC-26 w/BC614I 1 '51 Collins R-390A |
> | 1 '67 EAC R-390A, Heathkit DX-60, Apache, Mohawk, SX-101, HT-32A |
> +------------------------------------------------------------------+
> | Amateur Astronomer - Celestron Nexstar 8 |
> | 12" f5 Dob coming soon! Being built |
> | Meade ETX-60 (Got it back!) |
> | 38 Deg 46.8' N - 77 Deg 28.5' W |
> +------------------------------------------------------------------+
> | Opinions expressed are that of my own and do not necessarily |
> | coincide with or represent those of ANYONE else |
> +------------------------------------------------------------------+
> ALL E-mail received and sent scanned by AVG & Norton Anti-Virus>
>
>
>
>
>
> ------------------------------
>
> Message: 5
> Date: Thu, 1 Jul 2004 12:29:14 -0700
> From: "David Wise" <David_Wise at Phoenix.com>
> Subject: RE: [R-390] Ballastubes
> To: <r-390 at mailman.qth.net>
> Message-ID:
> <D38AF9D30B8679458E1A86BF317BDE791AF642 at hil-exch2k.phoenix.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> > From: Barry Hauser [mailto:barry at hausernet.com]
> >
> > A caution on the paperclip thing ...
> >
> > I have recently found that some chrome paper clips are not exactly
> > conductive out of the box. Apparently they're covered with
>
> This was enough to drive me out of hiding. I'll email to
> anyone who asks, a PostScript printout file of the schematic
> for a reverse phase control analog prototype of the 3DW7
> that I built a while ago before going digital*. If you've
> got good eyes, you can squeeze it into a "tubester" form factor,
> it dissipates only about half a watt.
>
> Just be sure to use conductive paper clips for the "pins", heh.
>
> 73,
> Dave Wise
>
> * I had a digital version ready to solicit buyers,
> but when someone mentioned simulating the olde-tyme
> orange glow I decided to take up the challenge.
> I'm still working on it as time permits, but it's
> a ways down my priority list.
>
>
> ------------------------------
>
> Message: 6
> Date: Thu, 01 Jul 2004 20:05:34 -0400
> From: Norm - WA3KEY <norm at wa3key.com>
> Subject: [R-390] T-195 meters/specs needed
> To: r-390 at mailman.qth.net
> Message-ID: <il99e0t6bg2ssa3vrm1s7eik7rhm1c5l4n at 4ax.com>
> Content-Type: text/plain; charset=us-ascii
>
> I recently found a beautiful, working T-195B transmitter to
> complete my GRC-19 station. Only one problem ... it has no
> meters. Fair Radio Sales reports they are out of stock and have
> no source for replacements. There's also references on the Web
> to a Michael Baranowsky (a.k.a. Baran's) in Pennsylvania who has
> R-390A, R-392 and T-195 meters and parts, but the listed phone
> number is no longer valid. And there are a few mentions of
> "reproduction meters" at various Web sites but no listed sources.
>
> If anyone on this list can help me find a set of original or
> replacement T-195 meters (or even just the specs) I'd be very
> appreciative. Surplus Sales of Nebraska has a few meters of
> similar style in their catalog that perhaps could be made to work
> in a pinch.
>
> I subscribe to this list in digest form so if you can help,
> please respond via e-mail to norm at wa3key.com
>
> Thanks for reading this note and for your assistance.
> 73 de Norm - WA3KEY
> norm at wa3key.com
>
>
>
> ------------------------------
>
> Message: 7
> Date: Thu, 01 Jul 2004 20:09:03 -0400
> From: Jim Brannigan <jbrannig at optonline.net>
> Subject: Re: [R-390] T-195 meters/specs needed
> To: Norm - WA3KEY <norm at wa3key.com>, r-390 at mailman.qth.net
> Message-ID: <002a01c45fc8$c8c0e840$6401a8c0 at 6vbp801>
> Content-Type: text/plain; charset=iso-8859-1
>
> I have a junker T-195.
> Give me a day or so to find the meters.
> We are in the middle of some major house construction, so the Junke Box is
> in more disarray than usual....
>
> Jim
>
> > I recently found a beautiful, working T-195B transmitter to
> > complete my GRC-19 station. Only one problem ... it has no
> > meters. Fair Radio Sales reports they are out of stock and have
> > no source for replacements. There's also references on the Web
> > to a Michael Baranowsky (a.k.a. Baran's) in Pennsylvania who has
> > R-390A, R-392 and T-195 meters and parts, but the listed phone
> > number is no longer valid. And there are a few mentions of
> > "reproduction meters" at various Web sites but no listed sources.
> >
> > If anyone on this list can help me find a set of original or
> > replacement T-195 meters (or even just the specs) I'd be very
> > appreciative. Surplus Sales of Nebraska has a few meters of
> > similar style in their catalog that perhaps could be made to work
> > in a pinch.
> >
> > I subscribe to this list in digest form so if you can help,
> > please respond via e-mail to norm at wa3key.com
> >
> > Thanks for reading this note and for your assistance.
> > 73 de Norm - WA3KEY
> > norm at wa3key.com
>
>
>
> ------------------------------
>
> Message: 8
> Date: Thu, 1 Jul 2004 21:23:47 -0400 (EDT)
> From: "Paul H. Anderson" <paul at pdq.com>
> Subject: Re: [R-390] T-195 meters/specs needed
> To: Norm - WA3KEY <norm at wa3key.com>
> Cc: r-390 at mailman.qth.net
> Message-ID: <Pine.BSF.4.58.0407012119450.81434 at localhost>
> Content-Type: TEXT/PLAIN; charset=US-ASCII
>
>
> I have a former NG T-195 that is pretty beat up, and really, really wants
> to work (my power supply isn't big enough at 45A, so I need a couple of
> car batteries, too). I want to learn morse code and use it once I get my
> ticket.
>
> One of the meters is, I believe, an AU meter like the audio level meter on
> the R-390s. The other is a dual scale meter that I don't recall. I need
> the dual scale one - I have one AU meter to put in.
>
> I'd love to know the specs of the RF and voltage meter - I have generic
> 1ma meters, and could probably adapt one of those.
>
> Paul
>
> On Thu, 1 Jul 2004, Norm - WA3KEY wrote:
>
> > I recently found a beautiful, working T-195B transmitter to
> > complete my GRC-19 station. Only one problem ... it has no
> > meters. Fair Radio Sales reports they are out of stock and have
> > no source for replacements. There's also references on the Web
> > to a Michael Baranowsky (a.k.a. Baran's) in Pennsylvania who has
> > R-390A, R-392 and T-195 meters and parts, but the listed phone
> > number is no longer valid. And there are a few mentions of
> > "reproduction meters" at various Web sites but no listed sources.
> >
> > If anyone on this list can help me find a set of original or
> > replacement T-195 meters (or even just the specs) I'd be very
> > appreciative. Surplus Sales of Nebraska has a few meters of
> > similar style in their catalog that perhaps could be made to work
> > in a pinch.
>
>
> ------------------------------
>
> Message: 9
> Date: Thu, 1 Jul 2004 22:57:28 -0500
> From: "Don Reaves W5OR" <w5or at comcast.net>
> Subject: RE: [R-390] T-195 meters/specs needed
> To: "'Norm - WA3KEY'" <norm at wa3key.com>, <r-390 at mailman.qth.net>
> Message-ID: <20040702040727.55294859BFF at mailman.qth.net>
> Content-Type: text/plain; charset="us-ascii"
>
> I sent Norm a separate message, but remembered a note on one of the other
> lists. So I'm sending him a second note with this clipping. Might be
useful
> to others here.
>
>
> -----
> RE: T-195 meters
>
> Not easy to find. The "Audio Level" meter is a 600 ohm VU instrument in
a
> 1.25" military case. I used to run into these with reasonable frequency
at
>
> East Coast flea markets. This meter is nice to have but not necessary
for
> operating the rig. The "Test" meter has custom scales for battery
(input)
> voltage, and PA grid and cathode current printed on with the radioactive
> paint used back then. This one is hard to find. A 1.25", 25ma
instrument
>
> can be substituted here and in normal operation all readings come up
> nominally at mid-scale.
>
> Dennis D. W7QHO
> Glendale, CA
> -----
>
> I have not tested the suitability of these replacements, so YMMV.
> Don W5OR
>
>
>
> ------------------------------
>
> _______________________________________________
> R-390 mailing list
> R-390 at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/r-390
>
>
> End of R-390 Digest, Vol 3, Issue 2
> ***********************************
>
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