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
Author: Gerald Williamson via Amps <amps@contesting.com>
Date: Thu, 19 Feb 2015 19:31:35 -0500
90W drive; how much reflected? 73, K5GW In a message dated 2/19/2015 5:22:23 P.M. Central Standard Time, steve@nr4m.com writes: Hello all, Took a QRO HF-2500 out of storage and put it on my 40 meter
The K3 that is driving it shows 1.2 or 1.3 to 1 standing wave. Steve On 2/20/2015 00:31 , TexasRF@aol.com wrote: 90W drive; how much reflected? 73, K5GW In a message dated 2/19/2015 5:22:23 P.M. Cent
Same problem on all bands? Carl KM1H The K3 that is driving it shows 1.2 or 1.3 to 1 standing wave. Steve On 2/20/2015 00:31 , TexasRF@aol.com wrote: 90W drive; how much reflected? 73, K5GW In a mess
Hi Carl, and others, My apologies for taking so long to get back you everyone on this. 'Life' got in the way. I got the amp moved over to another position and put the output into a dummy load. Drivin
Author: Gerald Williamson via Amps <amps@contesting.com>
Date: Mon, 2 Mar 2015 16:08:52 -0500
Steve, do you suppose one of the two tubes is not working? 73, Gerld K5GW In a message dated 3/2/2015 12:44:00 P.M. Pacific Standard Time, steve@nr4m.com writes: Hi Carl, and others, My apologies for
As in open filament? Wouldn't that affect the plate load impedance, tank settings? I once had a hb pair of 4-400's in which one plate lead broke. The one tube was cherry red and meter needles flying
What about the input VSWR? That amp is notorious for frying input circuits as well as that 40/80/160M toroid coil, especially in high duty cycle modes. Bandswitching a toroid at those impedance trans
With both rigs the input showed low SWR. 40m on the K3 and 40 and 20m with the Omni. I guess the next thing is to swap out the tubes, one at a time. Steve That amp is notorious for frying input circu
Happy 'Hump day' to all, I did a little investigation based on suggestions from members of the group. In preparation for running the amp with only one tube, and then the other tube, figured I would d
Happy 'Hump day' to all, I did a little investigation based on suggestions from members of the group. In preparation for running the amp with only one tube, and then the other tube, figured I would d
Thanks for you cautionary input, Jim, I have the two originals, here, on my desk. Two of the non-pedigreed spares are in the amp now, with no HV, cooking. I plan on also using my 'never-before-used'