Great question, Dick. I'm eagerly looking forward to the responses. 73 Bob Groh, WA2CKY Have been enjoying and learning from the discussions concerning IMD problems with SSB signals and their causes.
The story I heard concerning the 3-wire vs. 4-wire 240 VAC wiring is that back in the 1960s when we had the copper shortage, the NEC caved in and permitted, for special cases, the neutral wire to be
Thanks, Bill, that article really hits the spot. Added it to my library. 73 Bob Groh, WA2CKY Check out the following article by Bill Orr. http://ahars.com.au/documents/eimac01.pdf 73 bill wa4lav __ _
Amen, Bill. That was my first and last impression of the ad - why so much fiddling and f**ing around! The whole story just raised my suspicion level way up. As you said, you don't need a big elaborat
Carl, I would be very interested in your ideas on what should be added. My opinion was also that it was a bit limited (keeping in mind my absolute beginner status in high power amps) and could stand
Will it damage the slug or the meter? No Will the readings be anywhere close to accurate? Probably not (depending on your definition of accurate!). The regular accuracy is +/- 5%. I just don't know b
I bought one on Ebay for under $30 or so - a gun type device with an LED for aiming. Take a look on eBay for item #110937511368. Seems to work well (I used it for monitoring temperatures of devices i
CE only covered a ham band at a time - a lot less onerous task. They used a neat bandpass structure - patented, I believe. And, as you mentioned, not terribly high power (at least not to this group!!
Love your comments, Colin. I visualize a 'ring' of 813's (like the cylinders of an old radial airplane engine) - bases all toward the center. All behind a big window (you just have to be able to see
Nice stuff, Vic. Greatly enjoyed rambling through your pictures and descriptions. 73 Bob, WA2CKY I've updated my web site with pictures of my ongoing 4CX1000A project and my 813 amplifier. Here is th
Scrapping out a Singer SG-1000 RF Generator and I have a rather nice commercial grade cabinet left (which I hate to scrap out!). Pictures are here: https://picasaweb.google.com/115279229771946172442/
Love the response!! Bob, WA2CKY My birthday was the 2nd, and everyone was so shocked that I lived this long that they were typeless. DoN W4DNR _______________________________________________ Amps mai
Dave, You definitely want to reduce the power input to the spectrum analyzer down to something in the 0 dBm to +10 dBm level. I am not familiar with the HP 8924() family but I have had, in my prior l
One way to do this (externally - I'm not familiar with the AL-811H) is to 'buck' the primary voltage using a 6 or 12V transformer output winding in series with the ac primary feed. The current drain
I share your question - about the random turn on (ROT) VS zero crossing (ZC). It would seem to me that the zero crossing is the more benign condition as you would have (for any type of load) minimum
The short answer is that it is never a bad idea to have higher power rating resistors - well, assuming you can fit them in and that you use the right type. Generally the cooler something (electronic
I think they used the pair for at least 2 reasons: 1. Plate dissipation (of course) 2. Lower Rp for easier broad banding. Bob Groh, WA2CKY Greetings All, I just made a deal on one of these amps. Wa
Drax, I think your math/typing is a bit off. If I modify the math to match what I 'think' you intended then I think the answer is yes'ish. For a power of 1 mW (i.e. 0.001 watts), you can get there w
More cleaning up and 'rationalizing' (i.e. facing up to the fact that I will never get to use some of the parts I have been hoarding for all these years!) my parts collection. This sales is for thre
More cleaning up and 'rationalizing' (i.e. facing up to the fact that I will never get to use some of the parts I have been hoarding for all these years!) my parts collection. This sales is for a bu