[1000mp] MPV Driving Amp

[Win]

Mike,

The process took me about three hours.  It probably would have taken less 
time had I not chosen to do it after midnight.

I cut the coax back in 6 inch segments.  Each time I  put the connector on, 
I only soldered the very tip of the center wire. The compression of the 
reducer into the PL259 was adequate for a temporary ground connection. This 
allowed me to keep using the same connector.

There really was not much to it.  It was more piece work than anything.  I 
became very good at putting the connectors on, HI.

Your article on the BHI module was quite interesting.  I would kind of like 
to get one before the article appears in QST.  Will they be distributed in 
the US?  If not, I think I will go ahead and order one out of the UK.

Thanks, again.

Win

----- Original Message ----- 
From: "Mike Schatzberg" <cherokeehillfarm at earthlink.net>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Monday, October 23, 2006 2:22 PM
Subject: Re: [1000mp] MPV Driving Amp


> Nice going Win:
>
> Interesting how the Collins length of 20.5 feet dropped you well into the
> area where there is no danger of power foldback.
>
> I also see that the solution worked as well on 20 meters as it did on 15
> meters where the pruning was done.
>
> What we have from your data is that a length of 20.5 feet with the RG 8X
> Radio Works cable provides a simple solution to matching the Mark V into
> your modified SB 220.  Other people will have to reach their own solution
> for their own configuration.
>
> You might let the folks know about how long you had to work on the project
> to obtain the solution.  I wouldn't think that it would have been too 
> long.
>
> I have explained this simple system for evaluation to many stations over 
> the
> years, but I don't usually get the details about exactly how well it 
> worked.
> But I normally do hear that the results were the same as yours.
>
> Thanks for sharing your efforts with the reflector, "One experiment is
> indeed worth a thousand expert opinions".
>
> By the way, you might want to check out my website which has an early 
> draft
> of an article which will appear in
> QST later this year or early next year.  It concerns an improvement for 
> the
> Mark V in receiver audio DSP.
>
> I hope to find you soon on 20 meters enjoying your configuration.
>
> 73 and Happy DXing,
>
> Mike
> W2AJI
> http://home.earthlink.net/~cherokeehillfarm/id2.html
>
>
> ----- Original Message ----- 
> From: "Win" <w0lz at winlyn.us>
> To: <1000mp at mailman.qth.net>
> Sent: Monday, October 23, 2006 12:45 PM
> Subject: [1000mp] MPV Driving Amp
>
>
> OK, Mike, and anyone else that is interested, I started with 23 feet of 
> RG8X
> Premium Low Loss, FV 78% Center # 16, 1.2 db per 100' at 15 MHz coax from
> Radio Works. Drive was 30 watts on 15 meters into a old SB-220 that is
> somewhat modified for QSK and 10 meters,among other things.
>
> At 23 feet the SWR was 1.75:1 into the Amp - !,2:1 to the antenna
> At 20.5 feet the SWR was 1.15:1 into the Amp _ 1.2:1 to the antenna
>
> The readings in between I am leaving out because I was tired and don't 
> trust
> my notes.
>
> With the 20.5 foot cable SWR on 20 and 10 meters into the amp was 1.2;1 
> into
> the amp and 1.2:1 to the antenna.
>
> It works for me.  Thank you very much.
>
> Win
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