I have had a couple of people contact me off-list a problem with the v. 2.x Orions regarding the ability to drive external amplifiers to normal average power levels in SSB. I have referred to this as
Could it be power amp overcurrent drive cutback for protection of the amp? W9XX _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/m
If yo go back and read some of Doug Smith's original writings on the Orion, it appears to be DSP-based. I don't recall this ever being an issue on the 565 v1. I suspect it's another benefit of the r
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 21 Dec 2006 14:06:17 -0600
Average power may NOT be talk power. The fundamental problems come from two things: 1. the PA has a peak power limit that if you try to exceed that you get splatter. ALC works to prevent that over dr
First off, I would think that the TT final amp can take quite a bit more peak output and still stay within its linear range. Certainly an occasional transient peak exceeding 100 Watts by 1 dB wouldn'
See the section on Transmit Gain Control (TGC), here: http://www.doug-smith.net/digitalagc.htm. V2 or not, I suspect the general notion is still applicable and that transmit ALC is not purely an ana
Grant (NQ5T) said: "I don't recall this ever being an issue on the 565 v1. I suspect it's another benefit of the revised DSP code in v2/II." -- I checked the "talk power issue" on V1.373b5 a few minu
That is a dramatic difference between the v 1 and v 2, and the numbers you report on v 2 are in line with what I see here. I checked the O2 against the TS870 and saw average outputs on the O2 (barefo
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 21 Dec 2006 22:55:43 -0600
But can it do 1 dB more output without increasing intermod products by many more than 3 or 5 dB. E.g. is that 1 dB extra range (25%) still as linear as the power range up to the rated power? I suspec
An average of 800-900 with a 1400 peak is heavily, heavily compressed, is going to sound heavily compressed, is distorted <look at it on a scope>, and is not doing the transceiver or amp any favors,
Dennis (K8DO) said: "An average of 800-900 with a 1400 peak is heavily, heavily compressed, is going to sound heavily compressed, is distorted <look at it on a scope>, and is not doing the transceive
Well, if you are happy, I am happy... And what I am going to say is not rebuttal to you, etc., but simply how I see the issue... Other than maybe the "drive it till it howls to work dx" issue, I simp
In a DX pileup, the strong gravelly sound of heavy speech processing is essential to break a pileup. Rag chewing vs DX'ing pileups for rare stations require very different audio setups. Carl Moreschi
A pair of 4cx15000a's running at about 10Kv and 4.5A per tube will do a pretty good job, too :-) Grant/NQ5T _______________________________________________ TenTec mailing list TenTec@contesting.com
Different sounds for different purposes. I have found that even subtle changes in a pile-up can make you stand out enough to be heard. One more click on the SP, a little better shape on the EQ, point
Right. I was once trying to raise a DX op, when he said something like - "negative copy OM, your audio has too much bass". I adjusted to ~260 Hz Tx rolloff and ~2400 Hz bandpass, and raised him with
It is my opinion that Carl gives this group extremely well thought out advice. But I think his comment quoted below needs some clarification. As a KH7 prefix call I sometimes end up on the receiving
That may be true, but creating the QRM needed to get out in front is fair play, even though on the surface, it may not sound that way. Just like in sailboat racing, it's a fair tactic to pass upwind
How does "creating QRM" help one "get out in front"? (seriously, I don't get this and I've played in my share of pileups) 73 & Happy Holidays, Barry N1EU _____________________________________________
Simple...in keeps weaker stations from being heard under you. I learned that long ago when I operated KA2KS, an American Military Forces station in Japan. If you listen carefully to pile-up today, th