Re: [Elecraft] Sorta OT - assistive technology assistance needed

2019-01-17 Thread gt-i
James, a widely used design is to wire the sources together via some resistors, and get some gain by a following OP-amp. The resistors could be made as pots to adjust volume. I built one for my guitar amp, if you look into DIY guitar electronics you'll find plenty of design ideas. here is

Re: [Elecraft] Non-Resonant Antennas and Chokes

2019-01-17 Thread Wes Stewart
Oh dear.  Of course I know that stuff. BTW, except for very lossy RX antennas the only thing I know of that gives a "flat" SWR is a dummy load. The OP said, "My antenna, for 40 mtr's, is a 67' wire up about 25'."  Why should he make a 40-meter dipole so complicated? Wes  N7WS On 1/16/2019

Re: [Elecraft] SS Amp

2019-01-17 Thread W8JH
I have been happy with my SPE 1.3. Most important to me was the ability to use my 10W K3s or my KX3 to get full output if desired (I never felt the need use it at 1.3KW on air). I usually run it at 500-1000W output happily. The multiple antenna/radio ports are a plus. It is definitely noisier

Re: [Elecraft] Non-Resonant Antennas and Chokes

2019-01-17 Thread Ignacy
You have several choices. 1. Add voltage or current balun at tuner output. Voltage 4:1 is simpler. 2. Connect the ladder line directly but loop the coax by the tuner a few times around a large toroid. This is equivalent to adding a balun. Do not ground the tuner. The first option guarantees

Re: [Elecraft] SS Amp

2019-01-17 Thread macymonkeys
Me, too. Long live the KPA500 ;) John K7FD -From: "Raymond Sills" To: elecraft@mailman.qth.net Cc: Sent: Thursday January 17 2019 5:38:58AM Subject: Re: [Elecraft] SS Amp HI Gang: I'm glad that this is not an issue for me. Very happy to be a

Re: [Elecraft] SS Amp

2019-01-17 Thread Raymond Sills
HI Gang: I'm glad that this is not an issue for me. Very happy to be a QRP guy. 73 de Ray K2ULR KX3 #211 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

Re: [Elecraft] SS Amp

2019-01-17 Thread Petr, OK1RP/M0SIS
Hi, just FYI... the articles "Looking for clean SS HF PA w/QSK" in 6 parts on my blog here: http://ok1rp.blogspot.com/2018/11/looking-for-clean-ss-hf-pa-wqsk-part-6.html Talked about: SPE EXPERT 1.3K-FA ACOM 1200S JUMA PA1000 LINEAR Amp Gemini HF-1K Azden AZR-1000 Elecraft KPA1500

Re: [Elecraft] SS Amp

2019-01-17 Thread Petr, OK1RP/M0SIS
Hi, just FYI... the articles "Looking for clean SS HF PA w/QSK" in 6 parts on my blog here: http://ok1rp.blogspot.com/2018/11/looking-for-clean-ss-hf-pa-wqsk-part-6.html Talked about: SPE EXPERT 1.3K-FA ACOM 1200S JUMA PA1000 LINEAR Amp Gemini HF-1K Azden AZR-1000 Elecraft KPA1500 Burst-2000A