Re: [AMRadio] WANTED: 12VDC syncronous vibrator

[RJ Mattson]

Hi Charlie
I looked through my 1949 Radio Master catalog and could not find any G1803 
vibrator.

Must be a later part number. In 1949 most battery was 6 volts.
I have a complete Mallory VP-552 synchronous power supply with a Mallory 725 
synchronous vibrator installed.

Would this be any value to your project?
bob...w2ami

- Original Message - 
From: "charles free" <[EMAIL PROTECTED]>

To: "AM radio" 
Sent: Tuesday, February 21, 2006 12:16 PM
Subject: [AMRadio] WANTED: 12VDC syncronous vibrator



Hello all,

Still looking for a 6 pin 12VDC syncronous vibrator,
Mallory PN Type G 1803.  This is for a Narco
SuperHomer VHT-3 restoration project.
Have tried all the usual sources with no luck.
Anybody have plans for a solid state replacement for
this device? Please contact me via email:
mjcal77 at yahoo dot com.

 Thanks, Charlie W4MEC


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[AMRadio] Audio Amplifiers Japanese style from the late Shishido

[Jim Candela]

Below are several interesting circuits using the 801,
808, 811, 826, 838, 4d32, 2A3, etc. in what are mostly
single ended class A2 audio amplifiers. Some of the
circuitry may have uses in AM modulators.


http://members.at.infoseek.co.jp/lagarto/shishido/shishido-skema.htm

"He(Mr Kouichi(Nobu) Shishido) used to be use some
technic of inter stage transfomer.
his many amplifier are almost same technic of  inter
stage  transfomer. he  invented
call it's  inverse phase connection under interstage
transfomer amplifier.there are
almost use for Transmitter valves Amplifier as Audio
Hi End Amplifier.some one call
it's Positive Grid Amplifier.just I will  introducing
you some  circuit  diagram  of
shishido's amplifiers here."

Re: [AMRadio] one more

[Jim Candela]

Mark,

   These are too cool! Maybe that big arc is from the
keying relay at Geoff's place, W5OMR, on the mighty
Titanic!

   It was just yesterday I experienced a deafening arc
while running up the energy on an old Eaton 8200P ion
implanter. A metal door was open filling the high
voltage gap, and she let loose with a series of gun
shots at 185,000 volts DC! That temporarily killed the
HVAC system control, and the turbo pumps all spun down
in protest, as did the cryo pumps take a big gulp of
air. Contactors were a chattering, computers
resetting, etc. I had to kill it with the big red EPO
button. Nothing died! Today was better, and she's
stable at 250 kv, and was running a 370 Kev double
charge state phosphorous ion beam when I was leaving.

Regards,
Jim Candela
WD5JKO

--- Mark Foltarz <[EMAIL PROTECTED]> wrote:

>
http://video.google.com/videoplay?docid=8301293089993443959&q=voltage
> 
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[AMRadio] one more

[Mark Foltarz]

http://video.google.com/videoplay?docid=8301293089993443959&q=voltage

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Re: [AMRadio] 11-pin plugs available

[kc7hkp]

Hi John, I sent a e-mail for 10 plugs, are you going to send me a total for 
shipping ?
SENT E-MAIL ON SATURDAY NIGHT

--
KC7HKP 
George Yazzolino 
14801 NE 20th Circle 
Vancouver, Wa. 98684 
Grid CN-85

-- Original message -- 
From: John Lawson <[EMAIL PROTECTED]> 

> 
> I have acquired a Generous Quantity (+200) male 11-pin "octal" (yes yes, 
> I know...) male plugs. 
> 
> These are 'chassis mount' type plugs and have waffle-shaped retaining 
> rings with them, but no shells. They are keyed between pins 1 and 11. They 
> are NOS and have never been soldered or used. 
> 
> Free for postage from zip 89706 (Carson City, NV), one to "a handful". 
> Let's be reasonable, here folks... ;} 
> 
> Drop me a line OFF-LIST if any interest. 
> 
> Cross-post this to other BA Restoration lists as you see fit. 
> 
> 
> Cheers 
> 
> John KB6SCO 
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http://video.google.com/videoplay?docid=-3005249485929960832&q=switch

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RE: [AMRadio] FS: Homebrew, Tubes 4D32, 802, 809, 3B28, RK-xx, AWA OTB Set

[DAVID O'NEILL]

I WILL TAKE 3 OF THE 4D32 TUBES IN BOX.

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Merz Donald S
Sent: Wednesday, February 22, 2006 11:03 AM
To: 'Amradio (E-mail); 'Baswaplist' (E-mail); 'Glowbugs (E-mail)
Subject: [AMRadio] FS: Homebrew, Tubes 4D32, 802, 809, 3B28, RK-xx,AWA
OTB Set

For Sale

Homebrew 802 transmitter. Wood board on wood panel. From Jones Radio
Handbook 1937, P. 209-at least so says the set of original builder's
notes that are with it. It's all haywire and poor construction. With 80M
xtal, 80M coil (5-pin plug-in, center link) and 802 tube. Might be
useful for inspiration-and parts. $15

Homebrew audio generator. This is superbly built in a nice slant-front
black wrinkle cabinet 11.5 wide, 8 deep and 6.5 high. It has a
well-filtered 5Y3-based power supply and minimal controls-with
hand-lettered dial. This would be a great foundation for a homebrew
receiver. You could use the original holes-probably exactly. The power
supply should work for almost any set you'd like to build. $10

Raytheon RK-4D32 tube. Looks new but no box. The glass is stamped
DISPLAY SAMPLE. As-is $8

Raytheon RK-4D32 tube NOSB, $15 each, 3 available.

Fen-tone FM-135 crystal microphone, black bullet-style, volume control
on back of bullet, NOS in original box. $10

RCA NOS 802 Tube in gorgeous RCA world-map box. $12

RCA NOS 802 tube in standard RCA box. $9

Used 802 tube, untested, looks ok. $5

Raytheon RK-60 tube NOSB in JAN box. $9

RCA NOS 809 tubes in JAN boxes, $15 each, 2 available

RCA 809, used. $5 each, 3 available

Raytheon RK-34, used. $5

Raytheon RK-25, used. $5

7C5 locktal tubes, used, tested perfect. $5 each

3B28, used but good. $8 each, 2 available.

RCA 1 inch CRT 913 tubes, used. $10 each. 3 available.


AWA OTB Collection. All for $220 or best offer. Will not sell individual
issues.
AWA Old Timers Bulletin 1960: February (V1#2), April (V1#3)
AWA Old Timers Bulletin 1964: Spring (V5#1), Winter 64/65(V5#4)
AWA Old Timers Bulletin 1965: Spring (V6#1), Fall (V6#3)
AWA Old Timers Bulletin 1966: Spring (V7#1)
AWA Old Timers Bulletin 1974: 12
AWA Old Timers Bulletin 1975: 3, 6, 9, 12
AWA Old Timers Bulletin 1976: 3, 6, 9, 12
AWA Old Timers Bulletin 1977: 3, 6, 9, 12
AWA Old Timers Bulletin 1978: 3, 6, 9, 12
AWA Old Timers Bulletin 1979: 3, 6, 9, 12
AWA Old Timers Bulletin 1980: 3, 6, 9, 12
AWA Old Timers Bulletin 1981: 3, 6, 9, 12
AWA Old Timers Bulletin 1982: 3, 6, 9, 12
AWA Old Timers Bulletin 1983: 3, 6, 9, 12
AWA Old Timers Bulletin 1984: 3, 6, 9, 12
AWA Old Timers Bulletin 1985: 3, 6, 9, 12
AWA Old Timers Bulletin 1986: 3, 6, 8, 11
AWA Old Timers Bulletin 1987: 2, 5, 8, 11
AWA Old Timers Bulletin 1988: 2, 5, 8, 11
AWA Old Timers Bulletin 1989: 2, 5, 8, 11
AWA Old Timers Bulletin 1990: 2, 5, 8, 10
AWA Old Timers Bulletin 1991: 2, 5, 8, 10
AWA Old Timers Bulletin 1992: 2, 5, 6, 8, 11
AWA Old Timers Bulletin 1993: 2, 5, 8, 11
AWA Old Timers Bulletin 1994: 2, 5, 8, 11
AWA Old Timers Bulletin 1995: 2, 5, 8, 11
AWA Old Timers Bulletin 1996: 2, 5, 8, 11
AWA Old Timers Bulletin 1997: 2, 5, 8, 11
AWA Old Timers Bulletin 1998: 2, 5, 8, 11
AWA Old Timers Bulletin 1999: 2, 5, 8, 11
AWA Old Timers Bulletin 2000: 2, 5, 8, 11
AWA Old Timers Bulletin 2001: 2, 5, 8, 11
AWA Old Timers Bulletin 2002: 2, 5, 8, 11
AWA Old Timers Bulletin 2003: 2, Anniversary Issue, 5, 8, 11
AWA Old Timers Bulletin 2004: 2, 5, 8, 11
AWA Old Timers Bulletin 2005: 2, 5, 8, 11

Thanks for looking.
73, Don Merz, N3RHT
 
The information contained in this e-mail may be confidential and is
intended solely for the use of the named addressee.
Access, copying or re-use of the e-mail or any information contained
therein by any other person is not authorized.
If you are not the intended recipient please notify us immediately by
returning the e-mail to the originator.(16b)
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[AMRadio] FS: Homebrew, Tubes 4D32, 802, 809, 3B28, RK-xx, AWA OTB Set

[Merz Donald S]

For Sale

Homebrew 802 transmitter. Wood board on wood panel. From Jones Radio Handbook 
1937, P. 209-at least so says the set of original builder's notes that are with 
it. It's all haywire and poor construction. With 80M xtal, 80M coil (5-pin 
plug-in, center link) and 802 tube. Might be useful for inspiration-and parts. 
$15

Homebrew audio generator. This is superbly built in a nice slant-front black 
wrinkle cabinet 11.5 wide, 8 deep and 6.5 high. It has a well-filtered 
5Y3-based power supply and minimal controls-with hand-lettered dial. This would 
be a great foundation for a homebrew receiver. You could use the original 
holes-probably exactly. The power supply should work for almost any set you'd 
like to build. $10

Raytheon RK-4D32 tube. Looks new but no box. The glass is stamped DISPLAY 
SAMPLE. As-is $8

Raytheon RK-4D32 tube NOSB, $15 each, 3 available.

Fen-tone FM-135 crystal microphone, black bullet-style, volume control on back 
of bullet, NOS in original box. $10

RCA NOS 802 Tube in gorgeous RCA world-map box. $12

RCA NOS 802 tube in standard RCA box. $9

Used 802 tube, untested, looks ok. $5

Raytheon RK-60 tube NOSB in JAN box. $9

RCA NOS 809 tubes in JAN boxes, $15 each, 2 available

RCA 809, used. $5 each, 3 available

Raytheon RK-34, used. $5

Raytheon RK-25, used. $5

7C5 locktal tubes, used, tested perfect. $5 each

3B28, used but good. $8 each, 2 available.

RCA 1 inch CRT 913 tubes, used. $10 each. 3 available.


AWA OTB Collection. All for $220 or best offer. Will not sell individual issues.
AWA Old Timers Bulletin 1960: February (V1#2), April (V1#3)
AWA Old Timers Bulletin 1964: Spring (V5#1), Winter 64/65(V5#4)
AWA Old Timers Bulletin 1965: Spring (V6#1), Fall (V6#3)
AWA Old Timers Bulletin 1966: Spring (V7#1)
AWA Old Timers Bulletin 1974: 12
AWA Old Timers Bulletin 1975: 3, 6, 9, 12
AWA Old Timers Bulletin 1976: 3, 6, 9, 12
AWA Old Timers Bulletin 1977: 3, 6, 9, 12
AWA Old Timers Bulletin 1978: 3, 6, 9, 12
AWA Old Timers Bulletin 1979: 3, 6, 9, 12
AWA Old Timers Bulletin 1980: 3, 6, 9, 12
AWA Old Timers Bulletin 1981: 3, 6, 9, 12
AWA Old Timers Bulletin 1982: 3, 6, 9, 12
AWA Old Timers Bulletin 1983: 3, 6, 9, 12
AWA Old Timers Bulletin 1984: 3, 6, 9, 12
AWA Old Timers Bulletin 1985: 3, 6, 9, 12
AWA Old Timers Bulletin 1986: 3, 6, 8, 11
AWA Old Timers Bulletin 1987: 2, 5, 8, 11
AWA Old Timers Bulletin 1988: 2, 5, 8, 11
AWA Old Timers Bulletin 1989: 2, 5, 8, 11
AWA Old Timers Bulletin 1990: 2, 5, 8, 10
AWA Old Timers Bulletin 1991: 2, 5, 8, 10
AWA Old Timers Bulletin 1992: 2, 5, 6, 8, 11
AWA Old Timers Bulletin 1993: 2, 5, 8, 11
AWA Old Timers Bulletin 1994: 2, 5, 8, 11
AWA Old Timers Bulletin 1995: 2, 5, 8, 11
AWA Old Timers Bulletin 1996: 2, 5, 8, 11
AWA Old Timers Bulletin 1997: 2, 5, 8, 11
AWA Old Timers Bulletin 1998: 2, 5, 8, 11
AWA Old Timers Bulletin 1999: 2, 5, 8, 11
AWA Old Timers Bulletin 2000: 2, 5, 8, 11
AWA Old Timers Bulletin 2001: 2, 5, 8, 11
AWA Old Timers Bulletin 2002: 2, 5, 8, 11
AWA Old Timers Bulletin 2003: 2, Anniversary Issue, 5, 8, 11
AWA Old Timers Bulletin 2004: 2, 5, 8, 11
AWA Old Timers Bulletin 2005: 2, 5, 8, 11

Thanks for looking.
73, Don Merz, N3RHT
 
The information contained in this e-mail may be confidential and is intended 
solely for the use of the named addressee.
Access, copying or re-use of the e-mail or any information contained therein by 
any other person is not authorized.
If you are not the intended recipient please notify us immediately by returning 
the e-mail to the originator.(16b)

RE: [AMRadio] 1930's Old Buzzard Open Rack TransmitterFinallySeestheAirwaves! (Long)

[John Coleman ARS WA5BXO]

A pair of 812As should get you about max 360 watts out with 65 watt PD
in intermittent service (CW not AM).  I can't see the T55 doing better
with a lower plate dissipation limit.

For those that don't readily have the specs--

812A Class C Plate Modulated (CCS) 45 watt PD 
Plate Voltage . 1250 
VGrid No. 1 Voltage  -115 
VGrid No. 1 Current  35 mA
Plate Current . 140 mA
Driving Power . 7.6 W
Power Output (approx) . 130 W
Grid leak resistor  3286 ohms

That is 175 watts input on a single tube with 130 watts output.
Plate dissipation in this service is only 45 watts of the 65 watts
rated, so this should be a continuous duty service.
Push pull specs for Class C should yield about 350 Watts input and 230
watts output, an efficiency of 75 percent.

Grid current and plate current doubles for push pull service as does
output and driving power. Grid leak resistance should be one half or
about 1643 ohms 

The two most common cause of poor efficiency is improper drive/bias and
improper Q in plate tank circuit Ratio of (C to L).

These tubes are easy to drive, rugged, good efficiency, modulation
characteristics fantastic, low filament power, uses common components
for construction. 

In my opinion this service and tube line up is the best choice for a
conservatively rated light weight legal rig.   

John, WA5BXO 



-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Brett gazdzinski
Sent: Tuesday, February 21, 2006 9:44 PM
To: 'Discussion of AM Radio'
Subject: RE: [AMRadio] 1930's Old Buzzard Open Rack
TransmitterFinallySeestheAirwaves! (Long)

The T55 has 55 watts of plate dis, and gives 170 watts out?
The 812A has 65 watts of plate dis and gives 130 to 150 watts out?

I get about 275 watts out at 1500 volts, no color on the plates, 
maybe I should try the T55's, they will give me 340 watts out?

I never even plugged the T55's in or tested them.
Filaments are no problem, I have a panel mount variac 
to adjust the voltage between 0 and 12 volts.

I did try a set of 572b tubes, but they seem to work hard and not
give a lot more power output.

Brett
N2DTS 

> -Original Message-
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of crawfish
> Sent: Tuesday, February 21, 2006 10:07 PM
> To: Discussion of AM Radio
> Subject: Re: [AMRadio] 1930's Old Buzzard Open Rack 
> Transmitter FinallySeestheAirwaves! (Long)
> 
> My 1937 Jone Radio handbook says that a T-55 has 55 watt 
> plate dissipation,
> typical 1500 vdc plate voltage with -180 vdc grid bias, max. 
> Ip is 150 mA,
> max. Ig is 30 mA.10 watts RF  in, 170 watts RF out for 225 
> in.7.5 VAC @3.25
> on filament. The 811A is 65 watts plate dissipation, the 
> difference in the
> 811A and the 812 is that the 811A is zero bias and the 812A 
> needs -110 vdc
> bias. Power out of the 811/812 is 130 to 150 watts.
> 811A/812A info from 1970 ARRL Handbook.
>  Joe W4AAB
> - Original Message -
> From: "John E. Coleman (ARS WA5BXO)" <[EMAIL PROTECTED]>
> To: "'Discussion of AM Radio'" 
> Sent: Tuesday, February 21, 2006 8:33 PM
> Subject: RE: [AMRadio] 1930's Old Buzzard Open Rack 
> Transmitter Finally
> SeestheAirwaves! (Long)
> 
> 
> CONGRADULATIONS A JOB WELL DONE!
> I really like the choice of tubes.  I don't know what a T55 is but
> probably one of the special Taylor triodes with 55 watts 
> plate dissipation.
> Probably not a lot different than the 812s but I know that 
> the 812s are very
> good tubes to use in a class C plate modulated rig especially 
> if used with
> 100% grid leak bias or the configuration that Don, K4KYV, 
> uses where there
> is a safety bias supplied thru a diode and the diode becomes 
> reversed biased
> when RF drive causes grid leak bias.  The 100% Grid leak bias 
> DOES make a
> difference in the modulation characteristics of the rig.
> John, WA5BXO
> 
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of ne1s
> Sent: Tuesday, February 21, 2006 2:27 PM
> To: AM Radio Reflector; [EMAIL PROTECTED];
> [EMAIL PROTECTED]
> Subject: [AMRadio] 1930's Old Buzzard Open Rack Transmitter 
> Finally Sees
> theAirwaves! (Long)
> 
> 
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> 
> 
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