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Re: [TowerTalk] 6m QRO 2 Position Manual Antenna/Coax Switch

To: jim@audiosystemsgroup.com
Subject: Re: [TowerTalk] 6m QRO 2 Position Manual Antenna/Coax Switch
From: WW3S <ww3s@zoominternet.net>
Date: Wed, 22 Jul 2020 22:23:33 -0400
List-post: <mailto:towertalk@contesting.com>
The switches fail short as well, but easy to change them out in the 
shack.....plus, the alpha delta have mil-spec numbers.....several in use here 
with nary a problem, and yes DXE good price, great service and shipping are a 
plus....

Sent from my iPad

> On Jul 22, 2020, at 7:50 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
> 
> On 7/22/2020 10:03 AM, Wes wrote:
>> I have not looked inside one of their switches, but based on examination of 
>> some of their surge protectors, I would not recommend Alpha Delta.
> 
> I've used Alpha Delta switches for years,all 1x4s, mostly before replacing 
> them with good coax relays and relay-switched boxes, but also on portable 
> setups like FD and CQP. I HAVE looked inside, since I had one that was bad. 
> It wasn't broken, it was MADE that way, with a part missing so that there was 
> no way that position #4 was going to work. So much for final test. 
> Electrically they're fine. The 1x2's are made the same way.
> 
> I also have a few 1x2 Daiwa switches that seem pretty good. I haven't 
> measured any of them, but their mechanical construction of all of these 
> switches suggests that crosstalk/leakage should be very good.
> 
> The only other Alpha Delta product I've seen was their dipole insulator, 
> which includes a GDT. When it fries (shorted) on a lightning discharge or too 
> much TX power, the antenna must be lowered to correct the problem. That can 
> be a real PITA, depending on how the dipole is rigged. And, IMO, it's the 
> wrong place for a GDT to protect the radio. This was one of a half-dozen 
> dipole insulators I bought to figure out which were suitable for my needs.
> 
> 73, Jim K9YC
> 
> 
> 
> 
> 
> 
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