The most excellent N8LP LP100A has this feature as well. And I noticed that
my MFJ996 (or is it 998) has a cutout bypass that ties into the PTT line. I
think there are a lot of boxes out now that provide this capability.
Pretty good investment, especially given the cost of tubes - some of which
*really* hate to run into high swr loads...
73/jeff/ac0c
--------------------------------------------------
From: "Pete Smith" <n4zr@contesting.com>
Sent: Thursday, September 17, 2009 10:14 PM
To: "bob finger" <finger@goeaston.net>
Cc: <amps@contesting.com>
Subject: Re: [Amps] Amplifier scenario question
> The older VFD wattmeter also has a VSWR alarm that lights an LED, and
> they had an add-in kit to provide a relay. Homebrewing the relay
> circuitry would be quite easy.
>
> 73, Pete N4ZR
> New Articles Daily - the Contesting Compendium at
> http://wiki.contesting.com
> The World Contest Station Database, updated daily at
> www.conteststations.com
> The Reverse Beacon Network at http://reversebeacon.net
>
>
> On 9/17/2009 9:23 AM, bob finger wrote:
>> It already exists in at least the Array Solutions watt meter. I have
>> two of them protecting both amps. Breaks the ptt line very quickly and
>> has a choice of sense parameters. Mine are set for 2.5:1 vswr trip. 73
>> bob de w9ge
>>
>> Bill Fuqua wrote:
>>
>>
>>> Perhaps a nice thing to have would be a SWR limit detector of some
>>> sort
>>> to quickly switch the bypass relays so the signal is routed around the
>>> amplifier. Sounds like a neat product for a small market.
>>>
>>>
>>>
>>>
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|