? On SSB. running grid current with 4cx250Bs substantially increases the chances of one getting tarred and feathered at the next Ham swap meet. _______________________________________________ Amps m
If the P-out is ok on the lowest band, there could be a problem with the bandswitch's L-contacts. If the 40m L-contact is intact and the P-out on 80m and 160m is low, the problem could be in the Tun
** If either the Tune or Load control is at an end stop when P-out peaks, there is usually a bandswitch problem. - R.L. Measures/Rich..., AG6K, 805.386.3734, www.somis.org __________________________
** The power level adjustment on the TS-430S is internal. ** One way to control an amplifier from a TS-430S is to use the "RL" output (+12v on TX) on the Accessory jack to T/R-switch the amplifier.
Feedback-C, a.k.a. anode-grid C - in grid-driven tetrodes, and anode-cathode C in G-G triodes - is something I rarely see mentioned. Is it not important? - R.L. Measures/Rich..., AG6K, 805.386.3734,
? Even for a gassy tetrode with handles, I have never found one that would magikly get mo' betta by operating the filament. The bottom-line seems to be: if there's gas, you'd better pass. However, i
? I have heard reports of this too. It seems to me that the diameter of the conductors selected for Ameritron tank inductors needs to be greater in order to reduce I^2 x R loss. Also, adding a cooli
? Is there a problem with the original tubes? - R.L. Measures/Rich..., AG6K, 805.386.3734, www.somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://l
Was the 10+ minute warmup time for a heater-type cathode or for a thoriated-tungsten type cathode? - R.L. Measures/Rich..., AG6K, 805.386.3734, www.somis.org _________________________________________
Bart-- I would start by checking the bandswitch L contacts for continuity on the problematic bands. On Wednesday, October 1, 2003, at 08:22 AM, 2 wrote: Begin forwarded message: From: "Bart Ritchie (
The 10m tuned input of the Titan 425 needs to be reworked to raise the Q (from around 0.6 to around 2) if it driven with other than a Ten Tec radio. Another solution is to use a tuner after the radio
On Monday, October 13, 2003, at 02:56 PM, PAUL HEWITT wrote: Hi Norman You didn't spec a frequency. This may get you close, http://www.rfparts.com/caps.html#doorknob Or e-mail HEC at the link on this
Either new or a Dud. Also need SK1306 chimney. - R.L. Measures/Rich..., AG6K, 805.386.3734, www.somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://
On Tuesday, October 14, 2003, at 10:55 AM, Dennis12Amplify@aol.com wrote: Joe, Skip, Rich, ET. al...., Please 'critique' the following and see if I am wrong in any of my statements. PS. I also do not
On Wednesday, October 15, 2003, at 03:22 AM, John Bohnovic wrote: At 09:58 AM 10/14/03, rlm wrote: The 10m tuned input of the Titan 425 needs to be reworked to raise the Q (from around 0.6 to around
On Tuesday, October 14, 2003, at 11:45 AM, skipp isaham wrote: Hi Dave, The reason for the "warm up time" is not detailed in the paperwork I saw/read. For tubes without an ion-pump, the reason is aki
On Saturday, October 18, 2003, at 04:52 AM, ON4MA Marc wrote: When a switched on the commander 2500 a loud bang whas heard somewhere in the rfdeck. The main fuse from the shack was out ! I got this a
Correct. The anode insulator ring of tetrodes with handles also glows blue due to impact of electrons that miss the anode. This phenomenon is seldom seen because the standard chimney is opaque and My
** The Tune-C probably needs to be closer to the tubes for 6m, On Monday, October 20, 2003, at 12:51 PM, Jack Colson wrote: I wonder if anyone has converted the Drake L4B for 6 meters. Its basic cons
** A string of fwd-biased cheapo 3a rectifiers will survive a 200a surge - such as a HV flashover. A 50w zener will not. Also, zeners do not provide adjustable V and diode strings semi-do. On Monday,