Topband: F fitting adaptors

[Bruce]

Reference to my email, I did  not state I had an Ameritron. In fact I have 
no remotely switched receiving antennas. All receive antennas are switched 
in the shack.  Come to my QTH and walk the field and woods and 
see.....(Watch out for Deer ticks.) The Ameritron reference was to give an 
idea what was wanted for an adaptor.  Also, the adaptors are for a friend.

I used a reference that allowed a lot of speculation.  I should have said 
does anyone know where someone could purchase a  female F fitting to PL-259 
adaptor. (  ; > )

Thanks to all that helped by giving a place to make a purchase.

73
Bruce

----- Original Message ----- 
From: "Ronald Gorski" <R.Gorski at Astronautics.com>
To: "Tom W8JI" <w8ji at w8ji.com>; "Bruce" <k1fz at myfairpoint.net>; 
<topband at contesting.com>
Sent: Tuesday, December 04, 2012 5:37 AM
Subject: Re: Topband: F fitting adaptors


> Bruce, if you insist on using the Ameritron, PL259 to F adapters are
> available at Tower Electronics in Green Bay, WI
> They have an online catalog.
> Ron N9AU
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Tom
> W8JI
> Sent: Tuesday, December 04, 2012 5:25 AM
> To: Bruce; topband at contesting.com
> Subject: Re: Topband: F fitting adaptors
>
>> When using a Ameritron remote antenna switch with SO-239 fittings,
>> does anyone know a supplier for female F fitting to PL-259 adaptor ?
>>
>> Thanks,
>> 73
>> Bruce-K1FZ
>
> Bruce,
>
> IMO, you have the wrong switch. A transmitting type high-power switch is
> a terrible device for receiving. The larger the relays (has a general
> rule) the greater the problem, and it has nothing to do with sealed
> (enclosed) or unsealed (open) relays.
>
> High current relays are very problematic when only used at low power.
> The problem surrounds the large contact area and lack of wetting
> currents, and no significant voltage and current ever being applied to
> burn through any film on the contact. There are hundreds of papers by
> relay manufacturers or others detailing this problem, and it even occurs
> with brand new sealed or enclosed relays.
>
> The only high power relays immune to this issue are vacuum type relays.
>
> I think you are heading for long term problems with adaptors and a
> transmitting switch.
>
> 73 Tom
>
>
>
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