[Amps] high drive/low output QRO HF-2500
Steve Bookout
steve at nr4m.com
Thu Feb 19 19:40:22 EST 2015
The K3 that is driving it shows 1.2 or 1.3 to 1 standing wave.
Steve
On 2/20/2015 00:31 , TexasRF at aol.com wrote:
> 90W drive; how much reflected?
> 73,
> K5GW
> In a message dated 2/19/2015 5:22:23 P.M. Central Standard Time,
> steve at nr4m.com writes:
>
> Hello all,
>
> Took a QRO HF-2500 out of storage and put it on my 40 meter mult
> station.
>
> Tuned by the book (because I never can remember how to tune this
> thing
> without the book...) and the output is low at about 1050 watts.
> This
> is with about 90 watts of drive. When last used it was used on 15
> only,
> but always got plenty of power out. Efficiency looks fine at
> about 62%
> (700ma @ 2400 volts)
>
> As I recall, this amp used to drive full output with 35, or so, watts.
>
> Power doesn't drift, and tunes up easy. It's just acting more
> like an
> SB-220 than the amp it is.
>
> Plate and load cap settings appear correct per the manual.
>
> Ideas?
>
> 73 de Steve, NR4M
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
More information about the Amps
mailing list