[Amps] ALPHA 89

[Jim]

The LEDs on the amplifier would show the OUTPUT SWR not the input SWR 
that the radio sees...

Are you confusing the issue?


Thanks
73
Jim W7RY

On 3/14/2020 5:52 PM, BRADLEY FOCKEN wrote:
> 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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