Fw: [NLRS] TR-751 Output Spike?

Wed, 15 Jan 2003 21:42:06 -0600

Bud & all......

I've been successfully running the Kenwood 751A (all of last year) with a
DB6NT MKU 10G transverter......  I've not encountered any problem that I'm
aware of....  Initally, I lowered the output power of the 751A to just under
3 watts and didn't notice any spike when setting to that level....  But, it
is very possible that any spike may be of short duration and not noticeable
on an analog power meter...  Nor did I specificly look for a spike
indication....      Also, there is a 4 1/2 watt, 56 ohm resistor that sits
across the IF input that may potentially offer some protection.   I will
drag out the power meter and take a closer look.....One caution...you have
to make sure the 751 pushbutton is in the "low" power mode..

Overall, after running the DB6NT last year with the 751A, I'm very happy
with the setup....  Very good reciever/transverter sensitivity & NF; small
size; and medium power output of 200 mw.....  I felt worth the extra money
compared to other alternatives.....

Looking foward to hearing what others think about all this.....   Thanks!

73s      Jim     K0KFC

.----- Original Message -----
From: "Bud Patten" <[email protected]>
To: "Northern Lights Radio Society Reflector" <[email protected]>
Sent: Wednesday, January 15, 2003 7:51 PM
Subject: [NLRS] TR-751 Output Spike?

> Hi Gang,
> I just purchased a Kenwood TR-751A and was poking around the internet for
> possible mods to the rig.  I ran across the following message from Zack
Lau
> and wondered if any of you guys who are running the '751 as an IF rig have
> noted this problem?
>
> Bud
> w0lcp
>
> --------- Begin forwarded message ----------
> From: "Zack Lau" <[email protected]>
> Subject: Kenwood TR-751 power spike
> Date: Tue, 02 Sep 1997 19:31:56 -0400
> Message-ID: <[email protected]>
>
> I was going to use my TR-751A for QRP portable use,
> but haven't been able to eliminate the full
> power spike that occurs when you let up on the mic
> button when you are in USB--so I get 29 watts on
> the Bird PEP meter, even in the low power position.
> Doesn't appear to be a problem on CW or FM,
> but I wouldn't run the rig into a brick
> or transverter unless it could handle the
> 29 watt power spikes. --Zack W1VT  FN33kd in Sept VHF test
>
>
>
> Please check out my Web Site:  www.qsl.net\w0lcp
> and the Northern Lights Radio Society website at:
> http://nlrs.dropboxone.net/index.htm
>
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