On Sat, 10 Sep 2011 07:47:02 -0700, Guy Giacopuzzi wrote:
>So do you just put one of these devices in series with the hot line of
>the AC mains?
Yep. See the article by DL7MAJ that I posted the link to. They do get warm in
normal operation, so you want to allow them room to "breathe".
73
-Jim
So do you just put one of these devices in series with the hot line of
the AC mains?
Guy,
WA6OQQ
On 9/9/2011 9:06 PM, Jim Shorney wrote:
On Fri, 9 Sep 2011 22:44:35 -0500, Don Cunningham wrote:
I am trying a thermistor from Mouser on my 516F2 power supply for the KWM2A
at the suggestion of a
On Sat, 10 Sep 2011 09:50:28 -0400, Garey Barrell wrote:
>the 'greenies' attacked and
>demanded we unplug our electric toothbrushes!!
And yet, most of our modern electronics draws a small amount of standby power
to accomodate remote controls, "soft" power buttons, etc. I guess that's OK
Th
I use to keep the tube rigs warm and happy until
I got the electric bill
They are turned off now.
I'm not talking about one or two rigs either, there are dozens in the
shack, and they hit the electric up to the point they had to go dark.
mike
Mike Bryce, WB8VGE
the heathkit shop
Sun
Don -
This definitely helps mitigate turn-on surge currents. It's critical to get the 'right size', and
to mount it away from other components, as they DO get hot in operation. 'OH NO, 'wasted' power!'
They also reduce the voltage applied to all components by a small amount, which doesn't hu
Tom -
I just re-read your message...
Just HOW do you connect a 'reverse-biased diode' to AC???:-)
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
TC Dailey wrote:
Back in the day... I borrowed an idea from the color-TV "instan
Tom -
Good compromise! :-) This was common in LOTS of tube gear before the 'greenies' attacked and
demanded we unplug our electric toothbrushes!! They would have stroked over the 'Damp Chaser'
Hallicrafter's and others used in receivers. For the youngsters, a 'Damp Chaser' was an access
On Fri, 9 Sep 2011 23:20:10 -0500, Don Cunningham wrote:
>Mouser's
>part number is 527-CL40 and they aren't expensive new. Postage will get you
>if you don't need other devices, however!!
There was a big argument about this on another list, I think, but DigiKey
offers free shipping _with prep
That's about what I did here, Jim. I used the GE CL40 (5a unit) and it
works well. It does get warm, but not hot and does do the job. Mouser's
part number is 527-CL40 and they aren't expensive new. Postage will get you
if you don't need other devices, however!! I usually need other things,
On Fri, 09 Sep 2011 23:06:07 -0500, Jim Shorney wrote:
>
>See here:
>
>http://zerobeat.net/drakelist/smf/index.php/topic,252.0.html
The correct URL for Stefan's article is:
http://www.dl7maj.de/PS7-Inrush.pdf
73
-Jim
--
Ham Radio NU0C
Lincoln, Nebraska, U.S.S.A.
TR7/RV7/R7A/L7, TR6/RV6, T4X
On Fri, 9 Sep 2011 22:44:35 -0500, Don Cunningham wrote:
>I am trying a thermistor from Mouser on my 516F2 power supply for the KWM2A
>at the suggestion of a friend. I don't notice the "thump" on the
>transformer anymore, so it may just be enough of a delay to help protect
>switches, transform
I am trying a thermistor from Mouser on my 516F2 power supply for the KWM2A
at the suggestion of a friend. I don't notice the "thump" on the
transformer anymore, so it may just be enough of a delay to help protect
switches, transformers, etc. Sure initially looks like cheap insurance!!
I'll p
Back in the day... I borrowed an idea from the color-TV "instant on"
feature... soldered a reverse-biased diode across the ON/OFF switch, so that
only the negative-going pulses entered the power xfmr - it would light the
filaments half-brilliance, but no B+ was generated. the radios would be
Dan -
I ran four Drake 4 Series lines for six years in the 60's on
autostart RTTY. The stations ran 24/7, and transmissions
(at full power) of 30 minutes or more were not uncommon.
Each transmitter had a small fan mounted on the back of the
final cage. The receivers had no extra cooling, but
I haven't seen this discussed in the archives . . .
Several years ago (actually MANY years ago) I ran a Heathkit SB-102.
I never turned it off. Generally I put a muffin fan over the finals
and pulled air out for cooling. Sometimes I simply opened the lid and
let it run with convection cooling
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