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1. [Amps] AL1200 weak receive (score: 1): Author: "Ed Swiderski, KU4BP" <ku4bp@triad.rr.com>; Date: Fri, 29 Jul 2022 12:30:57 -0400; I have a confusing problem with my AL1200. During operation when the stdby/oper is on, the received signal is very weak. Switching back to standby and the signal level is fine. Checked the relay and; /archives//html/Amps/2022-07/msg00009.html (7,909 bytes)
2. Re: [Amps] AL1200 weak receive (score: 1): Author: donroden@hiwaay.net; Date: Fri, 29 Jul 2022 16:13:07 -0500; Isn't that the way the relay is supposed to work ?? W4DNR I have a confusing problem with my AL1200. During operation when the stdby/oper is on, the received signal is very weak. Switching back to st; /archives//html/Amps/2022-07/msg00011.html (8,103 bytes)
3. Re: [Amps] AL1200 weak receive (score: 1): Author: Mark Bitterlich via Amps <amps@contesting.com>; Date: Fri, 29 Jul 2022 17:45:03 -0400; Try unplugging the PTT line from the amp and see if the problem goes away. Sounds like when you are going to "operate" on the front panel, there is a path to ground from the relay coil. Either insid; /archives//html/Amps/2022-07/msg00012.html (9,762 bytes)
4. Re: [Amps] AL1200 weak receive (score: 1): Author: "Ed Swiderski, KU4BP" <ku4bp@triad.rr.com>; Date: Fri, 29 Jul 2022 18:06:32 -0400; Thanks Mark. I'm letting it the amp sit right now to discharge as it was on today Yes, just a WAG, but if you feel the relay contacts and spring are both good, this is all it can be. Famous last word; /archives//html/Amps/2022-07/msg00013.html (10,726 bytes)
5. Re: [Amps] AL1200 weak receive (score: 1): Author: Mark Bitterlich via Amps <amps@contesting.com>; Date: Fri, 29 Jul 2022 17:49:23 -0400; You could also go to "operate" and verify that the voltage is the same on both sides of the relay. If it is NOT the same, you've got a path to ground that is partially pulling the relay in. Yes, jus; /archives//html/Amps/2022-07/msg00014.html (10,400 bytes)
6. Re: [Amps] AL1200 weak receive (score: 1): Author: "Ed Swiderski, KU4BP" <ku4bp@triad.rr.com>; Date: Fri, 29 Jul 2022 18:12:31 -0400; Forgive my ignorance but I thought it was to put the amp in circuit. Which it does because power is output. Unkeying the amp and the receive is weak. When the op switch is on. Isn't that the way the; /archives//html/Amps/2022-07/msg00015.html (9,897 bytes)
7. Re: [Amps] AL1200 weak receive (score: 1): Author: Curt Nixon <radio.ku8l@gmail.com>; Date: Fri, 29 Jul 2022 18:38:45 -0400; This works but better know what you are doing because Amp will be powered up with b+ do it. KU8L _______________________________________________ Amps mailing list Amps@contesting.com http://lists.con; /archives//html/Amps/2022-07/msg00016.html (10,766 bytes)
8. Re: [Amps] AL1200 weak receive (score: 1): Author: Curt Nixon <radio.ku8l@gmail.com>; Date: Fri, 29 Jul 2022 18:44:49 -0400; Ed..does your Amp have the original 3 pole relay or is it the new version circuit board "functional identical" as indicated on the schematic? If it is the board model, it might have multiple relays w; /archives//html/Amps/2022-07/msg00017.html (10,786 bytes)
9. Re: [Amps] AL1200 weak receive (score: 1): Author: "Ed Swiderski, KU4BP" <ku4bp@triad.rr.com>; Date: Fri, 29 Jul 2022 18:56:11 -0400; It's the original On 7/29/2022 6:44 PM, Curt Nixon wrote: Ed..does your Amp have the original 3 pole relay or is it the new version circuit board "functional identical" as indicated on the schematic?; /archives//html/Amps/2022-07/msg00018.html (10,720 bytes)
10. Re: [Amps] AL1200 weak receive (score: 1): Author: "Ed Swiderski, KU4BP" <ku4bp@triad.rr.com>; Date: Fri, 29 Jul 2022 18:57:50 -0400; Okay. I've done it with no power to the amp and just the signal passing through and manually engaging the relay. Sounds like when you are going to "operate" on the front panel, there is a path to gro; /archives//html/Amps/2022-07/msg00019.html (10,244 bytes)
11. Re: [Amps] AL1200 weak receive (score: 1): Author: Aleksandar Petkovic <vk6apk@bigpond.com>; Date: Sat, 30 Jul 2022 07:47:05 +0800; Don't engage the relay. The relay must not be engaged during receive, no matter which position the operate switch is on. The only time the relay engages is during transmit. If it is engaged during re; /archives//html/Amps/2022-07/msg00020.html (11,029 bytes)
12. Re: [Amps] AL1200 weak receive (score: 1): Author: gudguyham--- via Amps <amps@contesting.com>; Date: Sat, 30 Jul 2022 00:07:21 +0000 (UTC); Based on your explanation theres a short in the antenna relay line. Sent from the all new AOL app for iOS Isn't that the way the relay is supposed to work ?? W4DNR __________________________________; /archives//html/Amps/2022-07/msg00021.html (10,911 bytes)
13. Re: [Amps] AL1200 weak receive (score: 1): Author: gudguyham--- via Amps <amps@contesting.com>; Date: Sat, 30 Jul 2022 00:08:37 +0000 (UTC); Just pull the relay ptt line out and see what happens its probably shorted. Sent from the all new AOL app for iOS Thanks Mark. I'm letting it the amp sit right now to discharge as it was on today ___; /archives//html/Amps/2022-07/msg00022.html (12,437 bytes)
14. Re: [Amps] AL1200 weak receive (score: 1): Author: gudguyham--- via Amps <amps@contesting.com>; Date: Sat, 30 Jul 2022 00:10:27 +0000 (UTC); Once again the relay is engaging in operate because the ptt line is shorted or closed by radio. Do you see plate idle current? Sent from the all new AOL app for iOS Forgive my ignorance but I though; /archives//html/Amps/2022-07/msg00023.html (11,468 bytes)
15. Re: [Amps] AL1200 weak receive (score: 1): Author: "Ed Swiderski, KU4BP" <ku4bp@triad.rr.com>; Date: Fri, 29 Jul 2022 20:20:48 -0400; I haven't checked. am going to look at it tomorrow. Sent from the all new AOL app for iOS <https://apps.apple.com/us/app/aol-news-email-weather-video/id646100661> Forgive my ignorance but I thought i; /archives//html/Amps/2022-07/msg00024.html (11,674 bytes)
16. Re: [Amps] AL1200 weak receive (score: 1): Author: Jim W7RY <jimw7ry@gmail.com>; Date: Fri, 29 Jul 2022 22:17:01 -0500; Which would indicate that the relay in the radio has its contacts welded together (or its transistor or FET shorted). 73, Jim W7RY On 7/29/2022 4:45 PM, Mark Bitterlich via Amps wrote: Try unplugging; /archives//html/Amps/2022-07/msg00025.html (9,972 bytes)
17. Re: [Amps] AL1200 weak receive (score: 1): Author: Curt Nixon <radio.ku8l@gmail.com>; Date: Sat, 30 Jul 2022 08:58:45 -0400; Don't think that is the case since he gets receive ok when the op switch is off. Really needs to isolate the relay coil to see if the coil is shorted to ground or it is wiring to the jack Acts the sa; /archives//html/Amps/2022-07/msg00026.html (11,322 bytes)
18. Re: [Amps] AL1200 weak receive (score: 1): Author: gudguyham--- via Amps <amps@contesting.com>; Date: Sat, 30 Jul 2022 13:34:46 +0000 (UTC); No, it is the case! The ONLY way the rx can be lost if the switch is in operate is if the antenna relay line is shorted to ground and the rx signal is fine in standby. Its very simple to determine; /archives//html/Amps/2022-07/msg00027.html (12,309 bytes)
19. Re: [Amps] AL1200 weak receive (score: 1): Author: Curt Nixon <radio.ku8l@gmail.com>; Date: Sat, 30 Jul 2022 10:06:09 -0400; I was saying it can't be welded contacts because the relay does its job and returns to rx when the op switch is in stay. Does this with the relay cable pulled out. This was reported and tested twice; /archives//html/Amps/2022-07/msg00028.html (13,855 bytes)
20. Re: [Amps] AL1200 weak receive (score: 1): Author: Curt Nixon <radio.ku8l@gmail.com>; Date: Sat, 30 Jul 2022 10:12:35 -0400; Ahh. I see our difference. You were talking about the relay contacts IN THE RADIO. ;) I had owner remove the relay cable early in the discovery to eliminate that. You are correct for sure about the a; /archives//html/Amps/2022-07/msg00029.html (13,155 bytes)

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