If you can come close with an audio output transformer just put that and a
speaker on it. You'll be able to hear your audio and see it on the scope as
well.
Rick/K5IAR
How does one test a modulator. I will soon have a modulator capable of
around 100 watts of audio
K6KWQ Dick
Amps by "MOR
Hello Dick,
Your method seems fine to me...it's what I do. A high wattage resistance across
the secondary close in value to the load impedance will work. Use your signal
generator and a scope to check waveform purity over the desired frequency
range, but be careful with your probe. The secondar
Hammarlund SP 600 JX17 with cabinet 300.00
Collins 51J4 Rack mount with covers 350.00
HP 606A Signal generator 80.00
Booton Model 260A Q meter 125.00
Viking I Needs lots of work 75.00
HP 410C volt meter with RF probe 80.00
Measurments Model 59 HF/UHF GDO Like new 125.00
All is pl
Phil, Howard or I want to buy the SP-600. Is the cabinet an original?? Also
what is the condition?? Where are you located in Florida??
-73- Peter K2LRC
www.k2lrc.com
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Phil LaMarche
Sent: Thursday, February
Phil, one more question...we also are interested in the 51J4. Does it have
all of the filters??
-73- Peter K2LRC
www.k2lrc.com
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Phil LaMarche
Sent: Thursday, February 28, 2008 3:38 PM
To: 'Discussion of AM R
Phil I would like the 51J4 if still available
My zip code is 33629
tnx
de KA4JVY
Mark
- Original Message
From: Phil LaMarche <[EMAIL PROTECTED]>
To: Discussion of AM Radio in the Amateur Service
Cc: Dennis Luther <[EMAIL PROTECTED]>
Sent: Thursday, February 28, 2008 3:37:50 PM
Gentlemen, PLEASE REPLY DIRECT TO THE SELLER as it states in the Subject
line.
Jim/W5JO
Moderator
__
Our Main Website: http://www.amfone.net
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Hammarlund SP 600 JX17 with cabinet 300.00 Sold
Collins 51J4 Rack mount with covers 350.00 Sold
HP 606A Signal generator 80.00
Booton Model 260A Q meter 125.00
Viking I Needs work 75.00
HP 410C volt meter with RF probe 80.00
Measurments Model 59 HF/UHF GDO Like new 125.00 Sold
Hey Rick
Put a 300 ohm resistor in series with the bottom leg of you parallel
resistors then probe across the 300 ohm there will be about 1/10 the voltage
therefore safer for you and the scope. 100 Watts into 3000 ohms would mean
about 547 volts RMS (about 1320 volts peak to peak) across t
I might add Rick that what ever the voltage that you are running on the DC
of the RF circuit the modulator must be capable of more than twice that
amount peak to peak on the scope for 100 percent modulation.
John, WA5BXO
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED
Great idea thanks!
K6KWQ Dick
Amps by "MORE POWER"
- Original Message -
From: "John Coleman" <[EMAIL PROTECTED]>
To: "'Discussion of AM Radio in the Amateur Service'"
Sent: Thursday, February 28, 2008 2:57 PM
Subject: RE: [AMRadio] Testing a modulator
Hey Rick
Put a 300 ohm resisto
Please reply to the seller and not me!! Forwarded from another list.Usual
disclaimers apply.
Joe W4AAB
- Original Message -
From: "George Babits" <[EMAIL PROTECTED]>
Sent: Thursday, February 28, 2008 11:36 AM
Subject: FS: AF-67
Have for sal
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