[TenTec] din connector, etc.

[Mike Schatzberg]

The Orion II delays RF for 15 ms after closure of the amplifier contacts. This applies to Ant1 and Ant2 as well. 

The amplifier hang time is adjustable for either Ant1 or Ant2 but the 15 ms delay is not adjustable and is applied in SSB and CW. 

The hang time keeps the amp from dropping out between characters if you wish. You can adjust it to hear your own echo coming back with very fast QSK. 

The 15 ms guarantees no hot switching of course with all QSK systems. 

No one has complained about a limitation in top speed that I am aware of. 

73,
Mike
W2AJI 

Sent from my iPhone

> On Sep 24, 2014, at 2:38 PM, Jim Brown <k9yc at audiosystemsgroup.com> wrote:
> 
> Understood, Rick.  But 17msec pretty much rules out QSK above about 18 WPM. A strange design compromise for Ten Tec.  :)  Frankly, I'm both surprised and disappointed to see Ten Tec go for the lowest common denominator -- they never used to do that.  For my money, amps with open frame relays are for ragchewing on SSB, not serious operating.
> 
> FWIW, delay in the K3 is continuously adjustable, and I think it is in the FT1000MP too. I sold mine around 2008 to buy my K3s. The TS850, which I also owned,  is fixed at about 8 msec. The K2 is 8 msec.
> 
> Also FWIW, K6XX published a simple "speed up" circuit for T/R relays quite a few years ago, which he credits to K1KP. http://www.k6xx.com/radio/fastrely.pdf
> 
> 73, Jim K9YC
> 
>> On Wed,9/24/2014 2:08 AM, Rick - DJ0IP / NJ0IP wrote:
>> Jim, I just sent an email explaining exactly how the Eagle works.
>> The Orion and Omni VII both have 15mS initial delay.  The Eagle is 17.
>> 
>> "17mS" is relative.
>> 
>> For amps with vacuum relays or PIN Diode switching, it is long.
>> For amps with open-frame relays it is too short.
>> 
>> I have never seen an open-frame relay that can switch in all cases, no
>> matter what, in less than 20ms.
>> The open-frame relay used in all Ameritron amps can occasionally take as
>> long as 22mS - even though Ameritron advertises 15mS.
> 
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