The auction has been pulled. 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.b
I wonder why 10 MHz is the lower limit? 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at reve
Mr. Dahl's passing happened at least a year ago. The business was sold. See http://www.harbachelectronics.com/main/page_xfmr_catalogs.html> for current availability. 73, Pete N4ZR The World Contest S
Interesting - perhaps the business was sold last year when he fell ill. In any case, I recall a lot of discussion at the time, ending with the word that the business had been sold. 73, Pete N4ZR The
There is also a lot of it sold in kitchen stores now in various forms - used as hotpads. 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon
I don't know if it has ever made the media, but KC3VO has a legal limit amp that rides in a trailer behind his Honda motorcycle. 73, Pete N4ZR The World Contest Station Database, updated daily at www
I have had recurrent trouble with filament pins coming unsoldered in my SB-220 during heavy contest operation, even though I have the replacement Harbach fan that is supposed to move something like 3
The melting was occurring inside the pins, not in the wiring of the socket. I used good high-temperature silver solder to do the resoldering. Interesting point about the Harbach fan - it certainly ma
I just installed a new GE Monogram range. It came with a 4-prong plug and cord, but with instructions for re-wiring to use a 3-wire circuit, which I did. In involved jumpering the chassis of the stov
Let's see... 9 x 3-500s on 27 MHz. Must be interesting grid and plate circuits. 1 kw to drive? 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse B
Don't you suppose it probably went like this, wherever it was? X-ray "What the heck is that?" box open "What the heck are those?" "Better get inside" hacksaw and drill "oops - better box it back up a
Steve, you might want to take a look at the PCB relays used by Inrad in their antenna switches. IIRC, they have been tested to 1.5 KW continuous, 30 MHz and at 3:1 load SWR, and the last time I bough
Sorry - same guy, different company. TopTen was what I meant. W2VJN was responsible for the design of their 6-way relay box. The ones W2VJN used in the antenna switch are Schrack RTD 14012. See <http
They have used both over the ~20 years the product has been out there, but I think Jim's point about the length of internal conductors is very interesting. 73, Pete N4ZR The World Contest Station Dat
I have an SB-220 that dates at least to 1978. There is no external sign of any problems, and the amp has been heavily used in contests for at least 20 years. It still delivers over 1300 watts on 80-2
Are any of the OM Power amplifiers type-accepted by the FCC? -- 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reverse
Bravo, Jim. Interestingly, Elecraft showed a PA-1500 at Dayton for several years, and I know they had at least one out for field test. It had a flock of super features, including very fast band-chang
I've been operating a lot of 18 MHz recently with my SB-220 set on 15 meters, and I now notice that the input SWR on 15 is over 2:1, resulting in some exciter foldback and reduced output power. I'm p
Thanks to all for your suggestions. In retrospect, I think I should have put more emphasis on the "why" aspect - is it dangerous to input circuit components to run an amplifier like an SB-220 on band
Took a look inside the top of the SB-220, and sure enough - I've melted the filament out of the pins on the left-hand 3-500. No wonder the input SWR is off... 73, Pete N4ZR The World Contest Station