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Total 33 documents matching your query.

1. [TenTec] Enhanced SSB (score: 1)
Author: ewell2@cvc.net (Mail)
Date: Fri Apr 18 11:20:39 2003
Good morning: Comment about linear amplifiers, yes 40 db over signal is really too much however I use my amplifier when I am net control of nets, and also when I send traffic to stations that are in
/archives//html/TenTec/2003-04/msg00457.html (7,999 bytes)

2. [TenTec] Enhanced SSB (score: 1)
Author: w9ac@arrl.net (Paul Christensen, Esq.)
Date: Fri Apr 18 11:44:03 2003
efficiency, and pass only the necessary voice bandwidth for communications. After researching the subject matter from QST issues during the '40s and '50s, I have concluded that SSB was developed as
/archives//html/TenTec/2003-04/msg00458.html (9,113 bytes)

3. [TenTec] Enhanced SSB (score: 1)
Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer)
Date: Fri Apr 18 13:16:09 2003
SSB achieves its superior communications performance compared to double sideband AM by saving the carrier power and concentrating the transmitter power into just one sideband AND by allowing half the
/archives//html/TenTec/2003-04/msg00460.html (14,483 bytes)

4. [TenTec] Enhanced SSB (score: 1)
Author: w8au@sssnet.com (w8au@sssnet.com)
Date: Fri Apr 18 14:38:07 2003
Jerry: Having had the Collins pair you speak of, I can attest they both used 3.1 filters, not 2.1. This was the reason I received so many "good quality" reports up into the late 80's, when the typica
/archives//html/TenTec/2003-04/msg00462.html (9,022 bytes)

5. [TenTec] Enhanced SSB (score: 1)
Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer)
Date: Fri Apr 18 15:06:59 2003
If the Collins S-line you had used 3.1 KHz filters it was something changed after the factory. The S-line filter (in my 75S3B FA21... part number stands for 2.1 KHz). The Gold Dust twins might have h
/archives//html/TenTec/2003-04/msg00463.html (8,644 bytes)

6. [TenTec] Enhanced SSB (score: 1)
Author: w9ac@arrl.net (Paul Christensen, Esq.)
Date: Fri Apr 18 15:16:36 2003
Prior to the implementation of NRSC mask in the early '90s, AM Broadcast stations had no upper limit. The NRSC mask now effectively limits the audio passband to approximately 9.5 kHz....and the serv
/archives//html/TenTec/2003-04/msg00464.html (8,868 bytes)

7. [TenTec] Enhanced SSB (score: 1)
Author: tongaloa@alltel.net (tongaloa)
Date: Fri Apr 18 16:23:19 2003
Just some reference points...re: the 3kHz spec. Sitting in my lap, as I type, is a card from telco FDM radio gear. The cover is off. The Alpha crystal filter is labeled 3.2kHz. I have in the warehous
/archives//html/TenTec/2003-04/msg00466.html (9,788 bytes)

8. [TenTec] Enhanced SSB (score: 1)
Author: w5yr@att.net (George, W5YR)
Date: Fri Apr 18 17:54:32 2003
Paul, are not AM broadcast stations still assigned frequencies on a 10 KHz spacing? If so, that would appear to limit the upper end of audio response to about 4500Hz, leaving a small amount of guard
/archives//html/TenTec/2003-04/msg00470.html (10,110 bytes)

9. [TenTec] Enhanced SSB (score: 1)
Author: geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer)
Date: Fri Apr 18 18:29:38 2003
Couldn't be a F455J-31 in the KWS-1. Its IF was 250 KHZ. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by permission only.
/archives//html/TenTec/2003-04/msg00472.html (8,583 bytes)

10. [TenTec] Enhanced SSB (score: 1)
Author: w8au@sssnet.com (w8au@sssnet.com)
Date: Fri Apr 18 20:17:42 2003
Well, they did have an upper freq limit spec as I recall. It was 7.5 kHz. When we ordered BC quality loaded lines from telco years ago it was 7.5 kHz for AM and 15 kHz for FM. I can see the correlati
/archives//html/TenTec/2003-04/msg00479.html (9,671 bytes)

11. [TenTec] Enhanced SSB (score: 1)
Author: w6ru@bak.rr.com (Terry Gaiser)
Date: Fri Apr 18 20:41:53 2003
Before NRSC there was no limit on AM BROADCAST frequency response ... I have proofed many AM stations that were flat response + - 2 DB from 50 hz to at least 12 KHZ. Before NRSC there were emission l
/archives//html/TenTec/2003-04/msg00484.html (10,850 bytes)

12. [TenTec] Enhanced SSB (score: 1)
Author: w9ac@arrl.net (Paul Christensen, Esq.)
Date: Fri Apr 18 20:43:11 2003
The telco loops were probably 8 kHz on unloaded twisted pair. Nevertheless, there was not a regulated upper-end frequency limitation prior to the implementation of NRSC. Someone mentioned 10 kHz cha
/archives//html/TenTec/2003-04/msg00485.html (12,231 bytes)

13. [TenTec] Enhanced SSB (score: 1)
Author: efricha@dimensional.com (Eric F. Richards)
Date: Fri Apr 18 20:58:20 2003
Jeez, you old folks need a yung'n like me (and a tech-minus to boot!) to remind you that before FM MPX stereo there were some that broadcast one channel on AM and the other on FM, and their AM tuner
/archives//html/TenTec/2003-04/msg00488.html (12,109 bytes)

14. [TenTec] Enhanced SSB (score: 1)
Author: K3MIY@CSONLINE.NET (RON ZOND)
Date: Fri Apr 18 22:00:35 2003
George the top limit for AM broadcsat rigs is 7500Hz with 2500 hz guard band. Including harmonic energy, the FCClimit is 30 khz Bear in mind the spacing of AM stations is done for this reason among o
/archives//html/TenTec/2003-04/msg00491.html (10,785 bytes)

15. [TenTec] Enhanced SSB (score: 1)
Author: attorney@broadcast.net (Paul Christensen, Esq.)
Date: Fri Apr 18 23:00:56 2003
efficiency, and pass only the necessary voice bandwidth for communications. After researching the subject matter from QST issues during the '40s and '50s, I have concluded that SSB was developed as
/archives//html/TenTec/2003-04/msg00498.html (10,221 bytes)

16. [TenTec] Enhanced SSB (score: 1)
Author: w2agn@w2agn.net (W2AGN)
Date: Fri Apr 18 23:01:11 2003
The 2.1 khz was standard on the S-line. The F455J-31 (3.1 khz) was standard on the 75A-4 and KWS-1 John W2AGN -- Entire content copyright John L. Sielke, BA, MBA, MM, Major USAF (retired) and all aro
/archives//html/TenTec/2003-04/msg00500.html (9,574 bytes)

17. [TenTec] Enhanced SSB (score: 1)
Author: al_lorona@agilent.com (al_lorona@agilent.com)
Date: Fri Apr 18 23:49:47 2003
Paul, I've been following very closely the digital experiments at WOR. For the rest of the folks: WOR is an AM radio station in New York. The most recent audio samples of the WOR analog and digital s
/archives//html/TenTec/2003-04/msg00504.html (15,112 bytes)

18. [TenTec] Enhanced SSB (score: 1)
Author: al_lorona@agilent.com (al_lorona@agilent.com)
Date: Fri Apr 18 23:56:50 2003
George, I'll take this one. While it is true that the channels are 10 kHz apart, in any one geographical area you never have two stations with adjacent channel allocations because the AM signal is wi
/archives//html/TenTec/2003-04/msg00505.html (11,879 bytes)

19. [TenTec] Enhanced SSB (score: 1)
Author: w4njf@midflorida.com (Bill Fulling)
Date: Sat Apr 19 08:09:51 2003
Hello Doctor! Great thread on what SSB is supposed to be. "Hi-Fi" SSB is a oxymoron.I read somewhere that SSB was developed in the early '30s by Phillips Electric of Holland at the request of the Dut
/archives//html/TenTec/2003-04/msg00518.html (17,697 bytes)

20. [TenTec] Enhanced SSB (score: 1)
Author: w7kxb@cox.net (KXBill)
Date: Sat Apr 19 11:28:14 2003
Hello Bill: FYI Western Electric manufactured HF SSB equipment in the 20's for AT&T's overseas radio circuits. -- Original Message -- From: "Bill Fulling" <w4njf@midflorida.com> To: <geraldj@isunet.n
/archives//html/TenTec/2003-04/msg00520.html (18,319 bytes)


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