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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+RF\s+Choke\s+At\s+Amp\s+Output\s+\?\?\s*$/: 8 ]

Total 8 documents matching your query.

1. [Amps] RF Choke At Amp Output ?? (score: 1)
Author: RICHARD SOLOMON <w1ksz@q.com>
Date: Thu, 20 Aug 2009 01:37:32 +0000
Several HB Amp circuits I see have an RF Choke across the Output. Other than the obvious (protection against Plate Coupling Cap short), what are the other Pro's and Con's ? I was thinking I should us
/archives//html/Amps/2009-08/msg00359.html (6,491 bytes)

2. Re: [Amps] RF Choke At Amp Output ?? (score: 1)
Author: "Bill, W6WRT" <dezrat1242@yahoo.com>
Date: Wed, 19 Aug 2009 19:17:32 -0700
ORIGINAL MESSAGE: REPLY: If your antenna is an open circuit for DC as many are, there would be a HV pulse applied to the coax through the plate blocking cap. If the DC leakage on your coax and antenn
/archives//html/Amps/2009-08/msg00360.html (7,548 bytes)

3. Re: [Amps] RF Choke At Amp Output ?? (score: 1)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Thu, 20 Aug 2009 07:27:36 +0100
A shorted quarter-wave coaxial stub would make a more robust safety 'crowbar' than a choke wound with fine wire, and it also attenuates the 2nd harmonic in the FM band. -- 73 from Ian GM3SEK http://w
/archives//html/Amps/2009-08/msg00364.html (8,428 bytes)

4. Re: [Amps] RF Choke At Amp Output ?? (score: 1)
Author: "Bill, W6WRT" <dezrat1242@yahoo.com>
Date: Thu, 20 Aug 2009 04:49:18 -0700
ORIGINAL MESSAGE: REPLY: That's ok until someone down the road changes antennas. You may not be the only owner of the amp. I like to think one of my grandkids might someday use grandpa's old amp. :-)
/archives//html/Amps/2009-08/msg00366.html (7,739 bytes)

5. Re: [Amps] RF Choke At Amp Output ?? (score: 1)
Author: "Jim W7RY" <w7ry@arrl.net>
Date: Fri, 21 Aug 2009 15:36:13 -0700
The only problem installing anything shorted (stub, antenna choke etc) on the output connector is that you arc the T/R relay when it goes into transmit mode! Why not just put a choke or 100K resistor
/archives//html/Amps/2009-08/msg00370.html (10,166 bytes)

6. Re: [Amps] RF Choke At Amp Output ?? (score: 1)
Author: "Bill, W6WRT" <dezrat1242@yahoo.com>
Date: Fri, 21 Aug 2009 18:43:17 -0700
ORIGINAL MESSAGE: REPLY: A resistor in place of the choke is not a good idea. If the blocking cap shorts, the resistor will almost certainly blow open and you are right where you were if there was no
/archives//html/Amps/2009-08/msg00379.html (8,332 bytes)

7. Re: [Amps] RF Choke At Amp Output ?? (score: 1)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Sat, 22 Aug 2009 07:26:19 +0100
Agreed - a resistor provides no protection against failure of the HVDC blocking capacitor. That's certainly the idea... but how many of us have ever confirmed that our "safety" chokes could really do
/archives//html/Amps/2009-08/msg00381.html (8,846 bytes)

8. Re: [Amps] RF Choke At Amp Output ?? (score: 1)
Author: Mike <k4gmh@arrl.net>
Date: Sat, 22 Aug 2009 07:49:48 -0400
Hello, Unfortunately, I've had a failed blocking cap. and the choke on the output did save a bunch of ant. switching relays and other parts. The choke did work as Bill, W6WRT, said it should. The cho
/archives//html/Amps/2009-08/msg00382.html (9,877 bytes)

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