Re: [AMRadio] Re: WRL Globe King 500C rebuild

[Mike Dorworth, K4XM]

811A's take -4.5 volts bias @ 1500 volts and give about 340 watts audio
level. They will take 2000 volts OK since the am rating is 1250 volts ( 2500
volts peak). 9 volts is the standard for 2000 volts I think.The Viking 500
uses 811A at 2000 volt and OK by the tube manufacturer at that time. Since
the 572B is a 2750 volt tube and will give way over 500 watts audio I would
just use them since the transformer is adjustable and going to changed
anyway. That way the voltages can all be the same.Mod and final.  73, Mike

[AMRadio] Re: [Boatanchors] Looking for copy of article to put 160 mtrs on DX-60

[Peter Markavage]

FYI:
That was for putting the DX-60B on 160; July80 and Dec80 issues.

Pete, wa2cwa

On Fri, 07 Jul 2006 14:17:45 -0600 rayfri <[EMAIL PROTECTED]> writes:
> There was a two part series in 73 Magazine years ago for modifying a 
> dx 
> 60 for 160 meters.  The first month was to modification
> itself and the next month was for a homebrew VFO for it.
> 
> If no one else has those two articles, I will dig them out, but it 
> will 
> take a while because I am set to leave town for a week.
> Ray  wa7itz
> 
> Rbethman wrote:
> 
> > Folks,
> >
> > The subject says it all!
> >
> > Bob - N0DGN

[AMRadio] Found article to put 160 mtrs on DX-60

[Rbethman]

Folks,

It is, once again, an article by Bil Breshears, WC3K.

It is ER, Number 140, January 2001.

Now to dig in and commence work on it!

Bob - N0DGN

--
  Bob Bethman - NØDGN
+--+
|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+
|   |
|   |
|   BC-61ØI w/BC-614I, T-213/GRC-26 w/BC614I  '51 Collins R-390A   |
|  SP-600/NR Type 159, Heath DX-60, Apache, Mohawk, SX-101, HT-32A |
+--+
| Amateur Astronomer - Celestron Nexstar 8 - Megrez 80mm SD II |
| 12" f5 Dob coming soon!  Being built |
|   38 Deg 46'48.62"' N - 77 Deg 28'26.89" W   |
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| coincide with or represent those of ANYONE else  |
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[AMRadio] Looking for copy of article to put 160 mtrs on DX-60

[Rbethman]

Folks,

The subject says it all!

Bob - N0DGN

--
  Bob Bethman - NØDGN
+--+
|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+
|   |
|   |
|   BC-61ØI w/BC-614I, T-213/GRC-26 w/BC614I  '51 Collins R-390A   |
|  SP-600/NR Type 159, Heath DX-60, Apache, Mohawk, SX-101, HT-32A |
+--+
| Amateur Astronomer - Celestron Nexstar 8 - Megrez 80mm SD II |
| 12" f5 Dob coming soon!  Being built |
|   38 Deg 46'48.62"' N - 77 Deg 28'26.89" 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 Windows OneCare Live   |
+--+ 

   

Re: [AMRadio] Re: Value of Homebrew Rigs, WAS: Stuff for sale...update.

[david knepper]

No message was sent.  Please excuse.


Dave, W3ST
Publisher of the Collins Journal
Secretary to the Collins Radio Association
www.collinsra.com - the CRA Website
Now with PayPal
CRA Nets: 3805 Khz every Monday at 8 PM EST
and 14255 every Saturday at 12 Noon EST
- Original Message - 
From: "david knepper" <[EMAIL PROTECTED]>

To: "Discussion of AM Radio" 
Sent: Friday, July 07, 2006 1:33 PM
Subject: Re: [AMRadio] Re: Value of Homebrew Rigs,WAS: Stuff for 
sale...update.





Dave, W3ST
Publisher of the Collins Journal
Secretary to the Collins Radio Association
www.collinsra.com - the CRA Website
Now with PayPal
CRA Nets: 3805 Khz every Monday at 8 PM EST
and 14255 every Saturday at 12 Noon EST
- Original Message - 
From: "Todd, KA1KAQ" <[EMAIL PROTECTED]>

To: "Discussion of AM Radio" 
Sent: Friday, July 07, 2006 9:19 AM
Subject: Re: [AMRadio] Re: Value of Homebrew Rigs,WAS: Stuff for 
sale...update.




On 7/6/06, W5OMR/Geoff <[EMAIL PROTECTED]> wrote:


I know Mike sold his KW-1, I know that Darrell/WA5VGO still has one, but
I don't know what happened to the prototype that the two of them worked
and slaved over, to get it on the air.


According to the list that W0YVA keeps, Darrell still has #66. I think
he was one of the guys pictured in the KW-1 issue of Electric Radio
that Barry put together a number of years ago, standing there with the
transmitter, a National NC-400, with a carved wooden callsign on top.
A very good article with a lot of information on the transmitter.
IIRC, the prototype you mention was the one used by Art one weekend
before it was completed, final assembly being done at his home during
dinner. Think that story is also in the ER issue along with the
original list of owners started by Ed Bolton, WA3PUN (not K0BS, who
took the list over from Ed).

Bob's list: http://www.isquare.com/personal_pages/kw1-list.htm


Luckily for us, Darrell/WA5VGO is a reader of the list.  Perhaps Darrell
would give us the complete history/rundown of the prototype KW-1?


It's now in Belgium with ON8PO, Mathieu. I seem to remember hearing
about this sale a few years back. What's amusing is that Mike is one
of the guys in the ER article who said he'd never part with his KW-1.
Bill Wheeler (former pres of the CCA) said this also, but sold his to
Jim Shoemaker a few years back who then flipped it on ebay. What's the
old saying...'never say never'? (o:

Collins made some very nice equipment over the years, very high
quality and leading edge stuff. Overbuilt for amateur service, really.
The major flaw isn't with the gear itself, but in the way some choose
to worship it or use it as a means of claiming some perceived
superiority. Gives the gear a bad name, but makes it a lot easier to
identify the real idiots in the hobby.

~ Todd,  KA1KAQ
__
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AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb 

Re: [AMRadio] Re: Value of Homebrew Rigs, WAS: Stuff for sale...update.

[david knepper]

Dave, W3ST
Publisher of the Collins Journal
Secretary to the Collins Radio Association
www.collinsra.com - the CRA Website
Now with PayPal
CRA Nets: 3805 Khz every Monday at 8 PM EST
and 14255 every Saturday at 12 Noon EST
- Original Message - 
From: "Todd, KA1KAQ" <[EMAIL PROTECTED]>

To: "Discussion of AM Radio" 
Sent: Friday, July 07, 2006 9:19 AM
Subject: Re: [AMRadio] Re: Value of Homebrew Rigs,WAS: Stuff for 
sale...update.




On 7/6/06, W5OMR/Geoff <[EMAIL PROTECTED]> wrote:


I know Mike sold his KW-1, I know that Darrell/WA5VGO still has one, but
I don't know what happened to the prototype that the two of them worked
and slaved over, to get it on the air.


According to the list that W0YVA keeps, Darrell still has #66. I think
he was one of the guys pictured in the KW-1 issue of Electric Radio
that Barry put together a number of years ago, standing there with the
transmitter, a National NC-400, with a carved wooden callsign on top.
A very good article with a lot of information on the transmitter.
IIRC, the prototype you mention was the one used by Art one weekend
before it was completed, final assembly being done at his home during
dinner. Think that story is also in the ER issue along with the
original list of owners started by Ed Bolton, WA3PUN (not K0BS, who
took the list over from Ed).

Bob's list: http://www.isquare.com/personal_pages/kw1-list.htm


Luckily for us, Darrell/WA5VGO is a reader of the list.  Perhaps Darrell
would give us the complete history/rundown of the prototype KW-1?


It's now in Belgium with ON8PO, Mathieu. I seem to remember hearing
about this sale a few years back. What's amusing is that Mike is one
of the guys in the ER article who said he'd never part with his KW-1.
Bill Wheeler (former pres of the CCA) said this also, but sold his to
Jim Shoemaker a few years back who then flipped it on ebay. What's the
old saying...'never say never'? (o:

Collins made some very nice equipment over the years, very high
quality and leading edge stuff. Overbuilt for amateur service, really.
The major flaw isn't with the gear itself, but in the way some choose
to worship it or use it as a means of claiming some perceived
superiority. Gives the gear a bad name, but makes it a lot easier to
identify the real idiots in the hobby.

~ Todd,  KA1KAQ
__
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Help: http://mailman.qth.net/mmfaq.html
Post: mailto:AMRadio@mailman.qth.net
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AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb

[AMRadio] [Boatanchors] PTT mod for DX-60

[Rbethman]

Here it is folks,

WC3K, Bill, (Uncle Bill to those that knew him.), Breshear developed 
this PTT mod for use by KA3STN.


Bill dated this April, 13, 2001, within 30 days of him becoming an SK.
Also noted on the schematic is the modulation limiting mod that is on 
the AM Window site.


THIS IS ATTRIBUTED TO WC3K, BILL BRESHEAR!

There are three, (3), .gif files on my website.

Here are their names and sizes:

dx-60-1.gif 2,963 KB
dx-60mid.gif3,869 KB
dx-60-2.gif 2,936 KB

Here are the links to get them:






Bob - N0DGN

--
  Bob Bethman - NØDGN
+--+
|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+
|   |
|   |
|   BC-61ØI w/BC-614I, T-213/GRC-26 w/BC614I  '51 Collins R-390A   |
|  SP-600/NR Type 159, Heath DX-60, Apache, Mohawk, SX-101, HT-32A |
+--+
| Amateur Astronomer - Celestron Nexstar 8 - Megrez 80mm SD II |
| 12" f5 Dob coming soon!  Being built |
|   38 Deg 46'48.62"' N - 77 Deg 28'26.89" 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 Windows OneCare Live   |
+--+



___
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** List Administrator - Duane Fischer, W8DBF/W9WZE **
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http://www.w9wze.org

Re: [AMRadio] Re: WRL Globe King 500C rebuild

[Jim Candela]

Don,

   I once used a GK 500B modulator deck as modulator
for a H.B. KW RF Final. I used 2250 volts, and used 4
type 808 in push pull parallel that produced a very
clean 600 watts of audio. The iron was not WRL iron,
so my story isn't too relevant to the discussion other
than stating how well those 808's did in that
application. I would not run 811's any higher than
2000 volts like what Johnson does with the 500. The
572B can take that and more with safety margin. As for
808's, fair radio used to sell these for 75 cents
each. Ozona Bob, W5PYT bought out their remaining
stock for a big HB AM rig that he never finished. If
you have a pile of them, they are a good choice. If
not go for 572B.

Regards,
Jim
JKO

--- Donald Chester <[EMAIL PROTECTED]> wrote:

> 
> In the stock transmitter, the final amplifier plate
> voltage is 1800 volts, 
> so the 2000 volts shouldn't cause too much of a
> problem.  The modulator 
> originally ran only 1200 volts on the plates of a
> pair of 811A's, and the 
> modulation transformer was just barely step-down,
> with a turns ratio of 
> something like 1.15:1.  Even so,  the modulator
> would just barely make about 
> 85% modulation in most transmitters, if you were
> lucky.
> 
> Running 2 kv on both with a common power supply
> should give better 
> modulation, but the final tank cap might arc over on
> modulation peaks.  This 
> is assuming that the G-C driver stage is capable of
> fully driving the 
> modulator at the increased plate voltage.  With a
> common power supply, the 
> modulation transformer should have turns ratio of
> about 1.4 or 1.5 to 1.  
> The 572B's MIGHT work OK with the stock audio 
> driver and mod transformer.
> 
> Don k4kyv
> 
> 
>
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> AMRadio mailing list
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> Help: http://mailman.qth.net/mmfaq.html
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> AM List Admin: Brian Sherrod/w5ami, Paul
> Courson/wa3vjb
> 

Re: [AMRadio] Re: Value of Homebrew Rigs, WAS: Stuff for sale...update.

[Todd, KA1KAQ]

On 7/6/06, Mark Foltarz <[EMAIL PROTECTED]> wrote:


I hope that the GPT-750  will attain similar status!


Have you seen the prices on these things lately? Easily on par or
above the T-368s and Desk KWs I've seen for sale. TMC made excellent
gear, and the 750 doesn't show up for sale very often. It already has
excellent status with the most important group: the actual on-air
operators. Who cares what the 'bag-it-and-shelf-it' types think?

Back in 2003 I drove out to Colorado to pick up a BC transmitter from
Barry Wiseman before his move back north of the border. At that time
he had 3 GPT-750s in various conditions. I often wonder who ended up
with them? I mentioned them to Joe, WA2PJP who contacted Barry about 2
months after I was there, but they were gone. Hope they found a good
home.

You definitely have a keeper, Mark.

~ Todd,  KA1KAQ

Re: [AMRadio] Re: Value of Homebrew Rigs, WAS: Stuff for sale...update.

[Todd, KA1KAQ]

On 7/6/06, W5OMR/Geoff <[EMAIL PROTECTED]> wrote:


I know Mike sold his KW-1, I know that Darrell/WA5VGO still has one, but
I don't know what happened to the prototype that the two of them worked
and slaved over, to get it on the air.


According to the list that W0YVA keeps, Darrell still has #66. I think
he was one of the guys pictured in the KW-1 issue of Electric Radio
that Barry put together a number of years ago, standing there with the
transmitter, a National NC-400, with a carved wooden callsign on top.
A very good article with a lot of information on the transmitter.
IIRC, the prototype you mention was the one used by Art one weekend
before it was completed, final assembly being done at his home during
dinner. Think that story is also in the ER issue along with the
original list of owners started by Ed Bolton, WA3PUN (not K0BS, who
took the list over from Ed).

Bob's list: http://www.isquare.com/personal_pages/kw1-list.htm


Luckily for us, Darrell/WA5VGO is a reader of the list.  Perhaps Darrell
would give us the complete history/rundown of the prototype KW-1?


It's now in Belgium with ON8PO, Mathieu. I seem to remember hearing
about this sale a few years back. What's amusing is that Mike is one
of the guys in the ER article who said he'd never part with his KW-1.
Bill Wheeler (former pres of the CCA) said this also, but sold his to
Jim Shoemaker a few years back who then flipped it on ebay. What's the
old saying...'never say never'? (o:

Collins made some very nice equipment over the years, very high
quality and leading edge stuff. Overbuilt for amateur service, really.
The major flaw isn't with the gear itself, but in the way some choose
to worship it or use it as a means of claiming some perceived
superiority. Gives the gear a bad name, but makes it a lot easier to
identify the real idiots in the hobby.

~ Todd,  KA1KAQ

Re: [AMRadio] Re: WRL Globe King 500C rebuild

[Donald Chester]

In the stock transmitter, the final amplifier plate voltage is 1800 volts, 
so the 2000 volts shouldn't cause too much of a problem.  The modulator 
originally ran only 1200 volts on the plates of a pair of 811A's, and the 
modulation transformer was just barely step-down, with a turns ratio of 
something like 1.15:1.  Even so,  the modulator would just barely make about 
85% modulation in most transmitters, if you were lucky.


Running 2 kv on both with a common power supply should give better 
modulation, but the final tank cap might arc over on modulation peaks.  This 
is assuming that the G-C driver stage is capable of fully driving the 
modulator at the increased plate voltage.  With a common power supply, the 
modulation transformer should have turns ratio of about 1.4 or 1.5 to 1.  
The 572B's MIGHT work OK with the stock audio  driver and mod transformer.


Don k4kyv

Re: [AMRadio] Re: WRL Globe King 500C rebuild

[Albert Santangelo]

The power supply sounds FB...but the plate tuning capacitor on the Globe King is
just marginal when you run the stock modulator power supply. Any components 
which
have modulated B+ appearing on them would have to be upgraded...caps..the
bandswitch etc.

Al
VE3AJM

W5OMR/Geoff wrote:

> [EMAIL PROTECTED] wrote:
>
> >Hello to all . well have gotten around to trying to restore my king that  was
> >salvaged from a basement flood. the PS and Modulator are gone but the RF
> >Deck is rehabbed and working great on caw with an out board globe vfo or 
> >xtal.
> >The question now is will my new 2000vdc @600ma power supply be ok to power 
> >the
> >modulator also? and was wondering about the modulator. I have a Stancor A3898
> > 300 watt vari match mod xformer and was wondering about Tubes I have a good
> >supply of 813 (Triode connected) or 572b. what do youall think
> >
> How much current is the GK500C drawing in the final, on CW?
>
> If I understand the nomenclature correctly, the '500' would/should be
> around 500w DC input to the final.  With 2000v, that would put the
> current around 250mA.
>
> I'd say you'll have plenty of current handling capacity at 600mA to
> handle the modulator.
>
> I'm not that familiar with the "C" version... what are the modulators,
> 811's?
>
> I found this old 'ad' on somewhere out there on the 'net...
>
> -
> Globe King 500C:  transmitter; Ad:  JAN 58 QST; price $795.00
> wired; 540 watts AM, 540 watts CW, 540 watts SSB (with external
> exciter); 160 thru 10 meters; bandswitching.  RF Section: 6AG7
> crystal oscillator, 6146 buffer, 4-400A final, 12AU7 keyer, 6X5
> and 5Y3 low voltage rectifiers.  Modulator:  6SJ7 speech
> amplifier, 6AL5 compression rectifier, 6C5 amplifier, 6L6G
> driver, push-pull 811A modulators, 5Y3 low voltage rectifier,
> pair 816 high voltage rectifiers; Power Supply:  5U4G low
> voltage rectifier, pair 866A high voltage rectifiers, 0A2
> voltage regulator, 6AU6 VFO, 6CB6 VFO buffer; shipping weight
> 300 lbs.
> -
>
> So, it's got a pair of 811A's.  I read also, somewhere, that the
> modulator deck had it's own power supply, that utilized a pair of 816
> mercury vapor rectifiers.
>
> Unless you've got a seperate Bias supply for the 811A's at 2kVDC, I'd
> say it's probably a bit much B+ to run on 811's.  1500v in Class B is
> about good, for zero bias.
>
> Yes, you'll have enough power supply with the 2kV @ 600mA, and the 811's
> will take the B+, as long as you put some bias voltage on the cathodes.
> An adjustable, well regulated bias supply between the 811A filament
> transformer center tap and ground would be a good place for that.
>
> --
> Driving your AM Rig without a scope,
> is like driving your car at night, without headlights. (K4KYV)
>
> --
> 73 = Best Regards,
> -Geoff/W5OMR
>
> __
> AMRadio mailing list
> Home: http://mailman.qth.net/mailman/listinfo/amradio
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>
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Re: [AMRadio] Re: WRL Globe King 500C rebuild

[W5OMR/Geoff]

[EMAIL PROTECTED] wrote:

Hello to all . well have gotten around to trying to restore my king that  was 
salvaged from a basement flood. the PS and Modulator are gone but the RF  
Deck is rehabbed and working great on caw with an out board globe vfo or xtal.  
The question now is will my new 2000vdc @600ma power supply be ok to power the  
modulator also? and was wondering about the modulator. I have a Stancor A3898 
300 watt vari match mod xformer and was wondering about Tubes I have a good  
supply of 813 (Triode connected) or 572b. what do youall think 


How much current is the GK500C drawing in the final, on CW?

If I understand the nomenclature correctly, the '500' would/should be 
around 500w DC input to the final.  With 2000v, that would put the 
current around 250mA.


I'd say you'll have plenty of current handling capacity at 600mA to 
handle the modulator.


I'm not that familiar with the "C" version... what are the modulators, 
811's?


I found this old 'ad' on somewhere out there on the 'net...

-
Globe King 500C:  transmitter; Ad:  JAN 58 QST; price $795.00
wired; 540 watts AM, 540 watts CW, 540 watts SSB (with external
exciter); 160 thru 10 meters; bandswitching.  RF Section: 6AG7
crystal oscillator, 6146 buffer, 4-400A final, 12AU7 keyer, 6X5
and 5Y3 low voltage rectifiers.  Modulator:  6SJ7 speech
amplifier, 6AL5 compression rectifier, 6C5 amplifier, 6L6G
driver, push-pull 811A modulators, 5Y3 low voltage rectifier,
pair 816 high voltage rectifiers; Power Supply:  5U4G low
voltage rectifier, pair 866A high voltage rectifiers, 0A2
voltage regulator, 6AU6 VFO, 6CB6 VFO buffer; shipping weight
300 lbs.
-

So, it's got a pair of 811A's.  I read also, somewhere, that the 
modulator deck had it's own power supply, that utilized a pair of 816 
mercury vapor rectifiers.


Unless you've got a seperate Bias supply for the 811A's at 2kVDC, I'd 
say it's probably a bit much B+ to run on 811's.  1500v in Class B is 
about good, for zero bias.


Yes, you'll have enough power supply with the 2kV @ 600mA, and the 811's 
will take the B+, as long as you put some bias voltage on the cathodes.  
An adjustable, well regulated bias supply between the 811A filament 
transformer center tap and ground would be a good place for that.


--
Driving your AM Rig without a scope, 
is like driving your car at night, without headlights. (K4KYV)


--
73 = Best Regards,
-Geoff/W5OMR