- 21. Re: [Amps] Solid State Amps (score: 1)
- Author: jeff millar <wa1hco@wa1hco.net>
- Date: Sat, 18 Oct 2014 12:52:15 -0400
- See below... On 10/17/2014 02:24 PM, Manfred Mornhinweg wrote: - Heat. Solid state devices simply are very small, and don't tolerate extreme temperature. So, a high power, class AB, solid state ampli
- /archives//html/Amps/2014-10/msg00168.html (26,874 bytes)
- 22. Re: [Amps] Dual 3-1000Z amp problem (score: 1)
- Author: jeff millar <wa1hco@wa1hco.net>
- Date: Tue, 19 Apr 2016 21:26:12 -0400
- Sounds like a situation with light loading. The plate voltage swing has reached a maximum and will not go higher. Are you tuning up with full plate voltage and full drive? When you increase the drive
- /archives//html/Amps/2016-04/msg00032.html (9,284 bytes)
- 23. Re: [Amps] When does an GG Amp draw current. (score: 1)
- Author: jeff millar <wa1hco@wa1hco.net>
- Date: Sat, 4 Jun 2016 10:40:42 -0400
- The grid draws current when it is positive compared to the cathode. This occurs on the positive peaks of the drive voltage. Tubes are very different in the relationship between grid voltage and plate
- /archives//html/Amps/2016-06/msg00014.html (9,427 bytes)
- 24. Re: [Amps] Ampleon BLF189XR 1900W LDMOS transistor (score: 1)
- Author: jeff millar <wa1hco@wa1hco.net>
- Date: Wed, 19 Oct 2016 23:43:37 -0400
- That's called the "tragedy of the commons". Selfish and uncooperative people ruin it for everyone. jeff, wa1hco _______________________________________________ Amps mailing list Amps@contesting.com h
- /archives//html/Amps/2016-10/msg00095.html (8,691 bytes)
- 25. Re: [Amps] LDMOS and VSWR (score: 1)
- Author: jeff millar <wa1hco@wa1hco.net>
- Date: Sat, 29 Oct 2016 23:37:12 -0400
- Hi Jim... IIRC, the amplifier in those video are using a pulse mode with limited duty cycle. The transistors have a high enough voltage rating to with infinite VSWR with a phase that causes open circ
- /archives//html/Amps/2016-10/msg00149.html (8,776 bytes)
- 26. Re: [Amps] LDMOSFET input impedance (score: 1)
- Author: jeff millar <wa1hco@wa1hco.net>
- Date: Fri, 2 Feb 2018 01:34:31 -0500
- I don't exactly know, but it's almost pure capacitance. As a starting point, on the order of 1000 pF. All those FET's have the same basic design, so if you find a similar transistor from the same man
- /archives//html/Amps/2018-02/msg00003.html (8,199 bytes)
- 27. Re: [Amps] LDMOSFET questions for insiders (score: 1)
- Author: jeff millar <wa1hco@wa1hco.net>
- Date: Wed, 21 Nov 2018 20:35:44 -0500
- Here are some things I think I know. The voltage rating is high enough to handle 100% reflected with any phase angle in 20% duty cycle pulse operation. Effectively, as long as the High SWR trip can o
- /archives//html/Amps/2018-11/msg00074.html (11,899 bytes)
This search system is powered by
Namazu