<<Joe -- 3kHz wide at how many db down?>> Rich, I'm not sure what the answer is but here's the proposal: http://www.arrl.org/announce/bandwidth.html <<< I have heard AM transmissions from amateur rad
I was able to get a 200 w. carrier out of my Centurion with only about 10 w. drive. I think the bw for ISB is proposed to be 9 KHz, and for DSB Carrier it's proposed to be 6 KHz. What all this with I
thanks Will, for the IR thermometer info. <<<However, they do take the carrier into more consideration than the modulated power due to the duty cycle. The transformer is supposed to be able to sustai
Thanks Rich for this information; it makes the fan on top blowing down on the Centurion anode heat sinks more important since they are the flat type spreading out horizontally. I guess these are supp
What's your source Gary for this? Here's mine: "The a.m. signal, however does not start from zero with no modulation. It works up and down about the carrier level, which is just one-half the modulati
-- "Steven Grant, W4IIV" <stevengrant98 at yahoo.com> wrote: the reason they are doing this is because some folks love to have very bassey audio. thier egos say that they must have broadcast quality
Not at all. Why? A. the > 3 khz guys are almost all using digital phase cancellation methods for sideband generation therefore there is no carrier and no opposite sideband to suppress. B. The few who
Actually Steve, the problem is usually that these stations are transmitting plenty of high end, (I have yet to hear of any ham who invests in the gear necessary to tx nice full audio and only bothers
Wow Gary, this is a great explanation and thanks for taking time to write and send it. A friend of mine and I were puzzling over the part having to do with the carrier being at half-level of the outp
Indeed, I have always said the best speech processor is a nice clean gg triode amp. Still need a speech processor (a.k.a. compressor)? Get a bigger amp. 73, rob/k5uj <<<A problem with speech processi
<<<Keeping in mind that if the core size was made larger, the transformer wouldn't bolt up in the equipment!>>> Yeah Will, the Dahl replacement for the Centurion is a tight fit inside the space for t
<<<Communications Quality Audio" has long been defined as ca. 2.7 - 3 KHz bandwidth ... a definition extending back into Bell Systems' "toll quality" standards.>>> Joe, if you will read the Polycom p
Not to digress (too much), but the comments on the SB220 tank and power handling and the AL-1500 tank being similar but for over 2 kw caused be to go back and take a look at some on-line photos of th
Thanks Bill, it sure makes sense to me and is probably one of the selling points vacuum tube bc xmitter mfrs used. also, they need some headroom because they go to around 120% positive. Rob/K5UJ From
Thanks Rich; the extra cooling I plan for the Centurion should help the tank a bit also. Rob/K5UJ From: R. Measures <r@somis.org> To: "Rob Atkinson, K5UJ" <k5uj@hotmail.com> CC: amps@contesting.com S
Hi Will, thanks very much for these observations. I apologize for not giving more information. I naively thought the photos would be enough. interesting what you said about the low frequency coil, as
Thanks Rich; it is a shame the 922 isn't being made anymore. Thanks Will for pointing out the obvious about aluminum. If I had thought about it more I would have realized the soldering difficulties a
Yes several 922s are for sale on ebay and qth.com. I read your interesting and entertaining comments on your website re the 922. there is useful information there not only for 922 owners but any 3-50
Okay Will, thanks--yes I can see the discoloration on the coil. replacing it someday with an air coil is an idea. 73, Rob/K5UJ _________________________________________________________________ Don?t
My dad would be getting a laugh about this if he were alive as he would recall the days when all car radios were tube radios, hi. I have to admit I employ a tube mic preamp on phone and to my ears it