Hi
I just got of the air on 38.70 with my ranger and swan Mark 1 amp
two 400zs.Got great audio reports,about 150 watt carrier,using the
low voltage = low power mod using the accessory plug,so simple to do .The mod
that ne1s spoke about , it works great and the audio quality is suburb,
Forget t
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:amradio-
> [EMAIL PROTECTED] On Behalf Of Jack Schmidling
> Sent: Saturday, November 04, 2006 10:04 PM
> To: Discussion of AM Radio in the Amateur Service
> Subject: Re: [AMRadio] Ranger... good news, bad news
>
> Mike Sawyer wrote:
Brian,
The three wire plug for 220 will have 2 HOT's, and the third is either a
ground or a neutral. Others on this exchange have said it is a neutral.
Whatever the case you have two HOT wires for sure that are 110-120 volts
above the 3rd pin, and they are phase wise 180 degrees apart from ea
> Trying to get a BC610 going and need to hook to one leg of existing
> 220 outlet, and now I'm just confused to say the least.
Unless your 220V woring has been upgraded to the new code requiring a neutral
as well as a ground in all new work 220V circuits, using one leg and ground
is illegal a
Dale Smith wrote:
Hi
I just got of the air on 38.70 with my ranger and swan Mark 1 amp
two 400zs.Got great audio reports,about 150 watt carrier,using the
low voltage = low power mod using the accessory plug,so simple to do .The mod
that ne1s spoke about , it works great and the audio quality
Gary Schafer wrote:
If the tubes glow in an SB200 you are running them too hard.
Roger but it is a good reference point. If it just starts to redden
after 5 mins, I consider this acceptable and time to shut up anyway.
js
--
PHOTO OF THE WEEK: http://schmidling.com/pow.htm
Astronomy, Beer
As I said before - the article for the solid state replacement
for the 25K pot in a Ranger / Valiant / DX100 etc. is on
the web SOMEWHERE. I just can't find it any more.
Can someone help find it?
> I guess, buy the issue from ER.
> For those who may or may not know, here's the complete ER Inde
Yes
http://www.amwindow.org/tech/htm/drivepot.htm
73 Jim SM2EKM
Brian Carling wrote:
As I said before - the article for the solid state replacement
for the 25K pot in a Ranger / Valiant / DX100 etc. is on
the web SOMEWHERE. I just can't find it any more.
Can someone help f
Its on the am window site,
http://www.amwindow.org/tech/htm/drivepot.htm
- Original Message -
From: Brian Carling <[EMAIL PROTECTED]>
Date: Sunday, November 5, 2006 1:55 pm
Subject: [AMRadio] 25 K Driver Pot Replacement (WAS: Ranger... good
news, bad news)
To: amradio@mailman.qth.net
Is this what you are looking for Brian?
http://www.amwindow.org/tech/htm/drivepot.htm
73 Jim
W5JO
As I said before - the article for the solid state
replacement
for the 25K pot in a Ranger / Valiant / DX100 etc. is on
the web SOMEWHERE. I just can't find it any more.
Can someone help fin
Aye, yup - with thanks to all of the thundering herd!!
I already had a link to it on my web site but just couldn't
find it for some reason!
I fixed that in a hurry! Got it in three categories now!
Mods, Heathkits and EF Johnson sections!
http://www.af4k.com/Boatanchors_Directory/
73 y'all!
>
I'm resurrecting a very nicely-built homebrew grounded-grid 813 amp. I
noticed that the filament voltage at the pins is 8.5 vac. Nominal on the 813
is 10
vac as I recall. Is the 8.5 OK or will emission suffer? I guess I could
also be into an RMS versus average metering issue... hmmm.
I a
Gary Schafer wrote:
> If the tubes glow in an SB200 you are running them too hard.
Roger but it is a good reference point. If it just starts to redden
after 5 mins, I consider this acceptable and time to shut up anyway.
js
Reply by Jim C:
Actually since linear AM efficiency doubles at
Steve WD8DAS said:
I'm resurrecting a very nicely-built homebrew grounded-grid 813 amp. I
noticed that the filament voltage at the pins is 8.5 vac. Nominal on the
813 is 10
vac as I recall. Is the 8.5 OK or will emission suffer? I guess I could
also be into an RMS versus average metering is
Hi Steve:
In addition to the things that Jim (JKO) said and to answer your
question "is 8.5 volts OK?", (assuming your meter is correct) no 8.5 volts
is not OK. Not only will the emission be low and power out low but the
tubes will suffer from a special illness that occurs from insufficie
I was going to comment earlier about the statement that this Ranger
would not hold it's on against the rice box with the SB200. As Jim pointed
out there should not be but a DB or so difference if the ranger is working
properly and properly tuned. I am curious as to what power his ranger w
Jack Schmidling wrote:
Most often mis-modification:
Reducing output power when driving a linear amplifier through the use of
a T connection and a dummy load and/or reducing loading or screen
Voltage. This situation wastes one of this rig's better resources namely
modulator headroom. When alt
John,
Are you peaking the output circuit on the SB200 after you reduce the drive?
If you are just using carrier out of it to drive the grid of the next amp
you should peak everything to get maximum efficiency. Efficiency should be
near 60% even at the low power level if you retune the plate circui
I've been using the SB-200 on AM since about the mid 90's. Still have the
same original tubes that were put in the unit in 1969. I can drive it
with the CE100V, 756PRO II, 706MKIIG, Johnson Ranger, and even a
Lafayette HA-410(on 10 meters). I've never seen the tubes show any color.
I do use, in ad
your 4 wire system for 220vac should be black wire 110v red wire 110v white
wire nrt and green wire ground. use either the black or red wire and the
green wire. ez way it to take a volt meter and put one lead on the black
wire and the other lead on the green wire you should read 110 volts ac.
Brian, the new old transmitter was really sounding good tonight before the
band dropped out. Now you've got big tubes to help keep the ham shack warm
this winter. :)
73',
KA5MIR
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Jim candela wrote:
A SB-200 is good for 100 to 130 watts RF output (carrier only) on AM.
This amount on top of a ranger output is way less than 1 S-unit.
Problem is sig reports go from barely readable to 20 over when I turn on
the amp.
>Replace that SB-200 with a SB-220 and the story
I am no expert on this issue, but I'd like to run my Ranger II with my 30L-1
linear. What about using a 2E26 in the Ranger II's final instead of the 6146?
I have not compared the two tubes specs.
Regards,
Robert W4RL Pensacola FL
___
Tony WA4JQS said:
"use either the black or red wire and the
green wire"
Reply by Jim WD5JKO:
Tony, this will work, but you are returning the 120 volt circuit through
your safety ground (green or bare wire), and as others have warned, just
don't do that because it is dangerous and illegal.
Thanks for the confirming information on the 813 filament situation. I took
a closer look at the amp and found several issues:
1. Small voltage drop in cold-looking solder joint on primary lug -
resoldered. Now 8.9 vac at the fil pins.
2. Substituted good Fluke RMS meter from my"electronics
Larry Szendrei wrote:
Modify the accessory plug as follows (or make a new one if you can find
a spare): remove the jumper between pins 2&6. External Ip meter (+)
terminal goes to pin 4; meter (-) terminal to pin 2. The jumper between
pins 3 & 5 stays as-is.
Almost took as long to describe i
From: "Jim candela" <[EMAIL PROTECTED]>
I am talking about a simple auto-transformer to transform 220 down to 110
vac. Using this method you can pull power from both HOT legs of your 220,
and not worry about whether that 3rd wire is a ground or neutral, or what
gauge wire that wire is.
Some 3
Anyone have a male (cable end) Millen HV connector for sale? It is to mate
with the dark-red type chassis female.
Thanks...
Steve WD8DAS
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Partner We
Gentlemen,
I said this before and few seem to realize it and take heed. The ground lead
in most old work 220V outlets is for safety ONLY. It was never meant to be the
return (neutral) lead so that you can pull 110V off between one side of the
line and ground. To do this safely and legally, you
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