Rick:
I know you would like to keep it original but even with today's
transformers at 120 volts, primary, the secondary still remains the same for
filament voltage. Another thing I don't understand at this point, why
monitor filament primary voltage? I would think to monitor the true filament
Byron, I have talked to my buddy and he does want the meter. So I assume the
shipping cost is the same for three meters for a total of $85...is that
correct?
Best 73's Peter K2LRC
www.k2lrc.com
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Byron Tatum
Yes Peter-
So I will be shipping three meters to you instead of two. The shipping
will be the same. Thank you and I have three meters reserved for you.
Thanks.
- Original Message -
From: Peter Wittenberg [EMAIL PROTECTED]
To: 'Discussion of AM Radio in the Amateur Service'
I'm looking for a Replacement Frequency Display Drum for Apache TX-1
Thanks
Paul
__
AMRadio mailing list
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Partner Website: http://www.amfone.net
Help:
KE4MG sells them at his website http://heathbelts.com/dials.htm or on Ebay.
It looks like a slightly better price on Ebay.
Tom K3TVC
- Original Message -
From: Paul Baldock [EMAIL PROTECTED]
To: amradio@mailman.qth.net
Sent: Tuesday, February 20, 2007 9:48 AM
Subject: [AMRadio] Wanted
Gary,
I sure do appreciate your advice and insight. I agree completely about
the monitoring of the secondary instead of the primary filament
voltage. I have no idea what GE was thinking other than to save a buck
or two by using one volt meter to set the filament on all the tubes
instead of
On Tue, 20 Feb 2007, Rick Brashear wrote:
Gary,
I sure do appreciate your advice and insight. I agree completely about the
monitoring of the secondary instead of the primary filament voltage. I have
no idea what GE was thinking other than to save a buck or two by using one
volt meter to
From Joe w5jdy in Okla... I wish to appologize for this subject matter.
I have been trying to contact Gary Brown at
[EMAIL PROTECTED] to see about some paper caps I have for re-stuffing.
I have emailed two or three times with no answer. Maybe he will read this
and contact me at [EMAIL
On 2/19/07, ronnie.hull [EMAIL PROTECTED] wrote:
probably just a loose nut between the chair and microphone LOL
Hey! I RESEMBLE That remark! ;-)
just joking.. Geoff is a good friend, I gotta jab at him every once in a
while!!
Trust me, he gets it right back, too! Alas, Ronnie had me sign
The reason that manufacturers install 100 V primary transformers, then add a
rheostat in front of it, is to allow some lattitude to adjust a filament +/-
around the nominal value. When the tube is old and emission starved, the
filament primary can be jacked up a few % this way, and the tube
Hi John,
I suspected as much as to why they used the 100 volt primaries. I also
figured they were saving money by using only one meter for all the
filament monitoring. That's risky business to say the least. In the
case of the BT-20-A I have it may have been a contributing factor in the
If a variac is used at 120 volts, you can get 140 volts out of it, guess it
depends on the variac connections. So, that kinda shoots that theory down.
Regards,
Gary...WZ1M
- Original Message -
From: John Lyles [EMAIL PROTECTED]
To: amradio@mailman.qth.net
Sent: Tuesday, February 20, 2007
The idea is to be able to compensate for low line voltage. The filament
xfmrs are fed from the 115 volt line through a rheostat to 100 volt primary.
In case of low line voltage just decrease the resistance in the rheostat
and you can bring filament voltage, which is somewhat critical with
So true... but then you could use just anybody's tranny! HI
Rick
gkb wrote:
If a variac is used at 120 volts, you can get 140 volts out of it, guess it
depends on the variac connections. So, that kinda shoots that theory down.
Regards,
Gary...WZ1M
-
It's been a while since I fiddled with the 610-E, but it seems I
remember they had all 115 vac primaries instead of the 100 volts as does
GE. I could be wrong, I'd have to pull the schematic.
Rick/K5IZ
D. Chester wrote:
The idea is to be able to compensate for low line voltage. The
I haven't received any messages in a couple of days. Has
the end of the earth occurred and I missed it?
Jim
W5JO
__
AMRadio mailing list
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Partner Website:
A rheostat is cheaper and smaller than a variac, offers a softer start on the
filament, and because of the temperature
coefficient of the filament, there is a small reduction in filament voltage
variation over line voltage fluctuations, although
that isn't much. A rheostat generates more heat,
Jim Wilhite wrote:
I haven't received any messages in a couple of days. Has the end of
the earth occurred and I missed it?
Jim
W5JO
working fine here in new orleans.
--
73 = Best Regards
W5OMR/5
__
AMRadio mailing list
List Home:
(Replying throuh the reflector and direct to sender manually)
Jim - the list has been active lately, and your query came through. I think a
spam filter is blocking it somewhere at your end.
Bacon, WA3WDR
__
AMRadio mailing list
List
[EMAIL PROTECTED] writes:
Try applying 122VAC to the secondary through a 1K, 20 watt power resistor.
The voltage to the windings should not drop much
from the no-resistor readings.
Thanks for the suggestion. There was little difference with a resistor in
series, however, so still not
Don, thank you very much for the great ideas on testing my Gates mod
transformer and reactor using the HV supply in the transmitter. I'll hopefully
get
back to it again in day or two and we'll see what the results are.
Steve WD8DAS
**
Check out free
21 matches
Mail list logo
