[Amps] ALPHA 89

[Robert .]

Thanks again

I didn't have six footer made up, but longer one.   Still coiled up, so not
sure of length.   K3 showed 1.4 !!
Nice.

I think I'm dealing with set of medical pulls on tubes.   Still good output
but tuning is different, more so on 40.

73 W5AJ

On Sat, Mar 14, 2020, 7:15 PM Robert <woodr90 at gmail.com> wrote:

> Brad,   Thanks,
>
>
>
> I did open up the input circuit area of the alpha and clean contacts on
> band switch.  Everything “Looks” brand new.
>
> didn’t go any further.   will try the six foot length….
>
>
>
> 73 W5AJ
>
>
>
>
>
> Robert
>
> Midland, Texas
>
>
>
> *From:* BRADLEY FOCKEN [mailto:bfocken at msn.com]
> *Sent:* Saturday, March 14, 2020 5:52 PM
> *To:* Amps at contesting.com; Robert <woodr90 at gmail.com>
> *Subject:* Re: [Amps] ALPHA 89
>
>
>
> Hello Robert,
>
> The 89 was set up using a 6 foot length of RG58.
>
> Try that and see what you get then it should be below 1.5. I would not
> recommend messing with the tuned input as it will cause the next person a
> similar problem.
>
> 73
>
> Brad K0HM
>
> Get Outlook for Android <https://aka.ms/ghei36>
>
>
> ------------------------------
>
> *From:* Amps <amps-bounces at contesting.com> on behalf of Robert <
> woodr90 at gmail.com>
> *Sent:* Saturday, March 14, 2020 4:32:47 PM
> *To:* Amps at contesting.com <Amps at contesting.com>
> *Subject:* [Amps] ALPHA 89
>
>
>
>
>
> I have Alpha 89 on test bench, it's an amp I've used for several years and
> decided to sell.
>
>
>
> On 40 meters the Alpha input SWR, using the Alpha LEDs about 1.2 to 1
>
> The K3 reads 2.9 to 1
>
> An outboard MFJ meter shows 2.5
>
>
>
> I've tried different coax jumpers, lengths, etc.
>
> SWR improves (2.9 best) as increase Alpha to 1500 Watts output but at ten
> watt "Test" output of K3, the SWR indicates on K3 near 15 to 1
>
>
>
> Bands outside 40/80 are fine.   80 is more 2 to 1 input, other bands, 1.1
> to
> 1.
>
>
>
> Thoughts??
>
>
>
> 73 W5AJ
>
>
>
> Robert
>
> Midland, Texas
>
>
>
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