[Elecraft] FIELD DAY PREP

[donovanf at starpower.net]

When running multiple HF transmitters simultaneously its wise to: 
- avoid multi-band antennas, or 
- use external bandpass filters, or even better 
- avoid multi-band antennas and use bandpass filters 


73 
Frank 
W3LPL 

----- Original Message -----

From: "Bob McGraw K4TAX" <rmcgraw at blomand.net> 
To: donovanf at starpower.net 
Cc: elecraft at mailman.qth.net 
Sent: Friday, June 14, 2019 5:36:21 PM 
Subject: Re: [Elecraft] FIELD DAY PREP 

Neither should G5RV antennas. 

Bob, K4TAX 


Sent from my iPhone 

> On Jun 14, 2019, at 10:44 AM, donovanf at starpower.net wrote: 
> 
> oops... I meant to say: 
> 
> 
> Inverted V dipole and verticals are NOT allowed at W3AO 
> 
> 73 
> Frank 
> W3LPL 
> 
> ----- Original Message ----- 
> 
> From: donovanf at starpower.net 
> To: elecraft at mailman.qth.net 
> Sent: Friday, June 14, 2019 3:40:43 PM 
> Subject: Re: [Elecraft] FIELD DAY PREP 
> 
> We use a dozen K3 transceivers at W3AO, we've never had a K3 
> failure despite running as many as four K3s on the same band 
> (CW SSB Digital and GOTA). The four K3s on each band do not 
> interfere with each other either. 
> 
> 
> 
> Our secrets to success: 
> 
> 
> - same band antennas are horizontally polarized and oriented exactly 
> end-to-end. Inverted V dipole and verticals are allowed. 100 feet 
> of tip-to-tip spacing appears to be adequate, although we use much more. 
> 
> 
> - We install W3NQN bandpass filters on every K3 to avoid overload 
> from signals from nearby antennas for other bands. 
> 
> 
> Its not widely known that K3 transceivers have built in bandpass 
> filters. As far as I'm aware their performance characteristics have 
> never been published, hence our preference to also also use external 
> bandpass filters. 
> 
> 
> 73 
> Frank 
> W3LPL 
> 
> 
> 
> 
> 
> ----- Original Message ----- 
> 
> From: "Bob McGraw K4TAX" <rmcgraw at blomand.net> 
> To: elecraft at mailman.qth.net 
> Sent: Friday, June 14, 2019 3:24:01 PM 
> Subject: Re: [Elecraft] FIELD DAY PREP 
> 
> With stations running 100 watts or less and reasonable antenna 
> separation, I've found no reason for a Receiver Input Protector. 
> Although, it might be a good idea to circumvent a "screw up" by an 
> operator. I've seen some mighty strange things done by knowledgeable 
> hams at Field Day. 
> 
> 73 
> 
> Bob, K4TAX 
> 
> 
>> On 6/14/2019 10:07 AM, KENT TRIMBLE wrote: 
>> Have any of you used Ameritron's "Receiver Input Protector" model 
>> TRP-150? I find no reviews on eHam. 
>> 
>> 73, 
>> 
>> Kent K9ZTV 
>> 
> 
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