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Total 18 documents matching your query.

1. Topband: SB-1000 (score: 1): Author: Jim Murray via Topband <topband@contesting.com>; Date: Thu, 17 Dec 2015 18:56:25 +0000 (UTC); If it is being driven with 50 watts or more and does not tune into a 50 ohm load, I'd carefully inspect the entire tank circuit and wiring of the tank. This includes the switch (as Herb suggested).; /archives//html/Topband/2015-12/msg00212.html (8,009 bytes)
2. Re: Topband: SB-1000 (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Thu, 17 Dec 2015 14:52:44 -0500; Thanks to all. I will go over it again today. I initially started out on 160 and then moved on to other bands. On 160 I could not get any increase in grid current, it came up but no increase with pla; /archives//html/Topband/2015-12/msg00217.html (8,508 bytes)
3. Topband: SB-1000 (score: 1): Author: Jim Murray via Topband <topband@contesting.com>; Date: Thu, 17 Dec 2015 19:52:49 +0000 (UTC); Just came off 20M, amp working fine. Went to 160 plate and load controls have no control, no output. Plate current climbs high with any added drive (45-50W) and blew both 10amp fuses.Off comes the c; /archives//html/Topband/2015-12/msg00218.html (7,078 bytes)
4. Re: Topband: SB-1000 (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Thu, 17 Dec 2015 15:30:17 -0500; Just came off 20M, amp working fine. Went to 160 plate and load controls have no control, no output. Plate current climbs high with any added drive (45-50W) and blew both 10amp fuses.Off comes the co; /archives//html/Topband/2015-12/msg00220.html (8,352 bytes)
5. Re: Topband: SB-1000 (score: 1): Author: Don Lynch <w4zyt.don@gmail.com>; Date: Thu, 17 Dec 2015 20:49:42 +0000; Also check the contacts on the bandswitch. I have that amp and have a similar problem with 160 operation, apparently from burning out one of the contacts on the switch. It would be a bear to change o; /archives//html/Topband/2015-12/msg00222.html (9,026 bytes)
6. Re: Topband: SB-1000 (score: 1): Author: Jim Murray via Topband <topband@contesting.com>; Date: Sat, 19 Dec 2015 19:27:23 +0000 (UTC); My mistake on the last post. The contact with nothing on it is when the bandswitch is in the 160 AND 80M position. jimk2hn _________________ Topband Reflector Archives - http://www.contesting.com/_; /archives//html/Topband/2015-12/msg00277.html (7,363 bytes)
7. Topband: SB-1000 (score: 1): Author: Jim Murray via Topband <topband@contesting.com>; Date: Sat, 19 Dec 2015 20:00:11 +0000 (UTC); Ah, quick look at the schematic. Nothing on that bandswitch lug. Seeing some solder on it thought for sure something missing. Black ungrounded wireschematic shows it grounded although just doubled; /archives//html/Topband/2015-12/msg00278.html (7,647 bytes)
8. Topband: SB-1000 (score: 1): Author: Jim Murray via Topband <topband@contesting.com>; Date: Sun, 20 Dec 2015 21:38:15 +0000 (UTC); After a pretty thorough check on the ailing 160M section this what I have in mind and would appreciate any further suggestions. All previous owner wiring is ok. One missing connection is 10M mod. 1; /archives//html/Topband/2015-12/msg00284.html (8,234 bytes)
9. Re: Topband: SB-1000 (score: 1): Author: Don Lynch <w4zyt.don@gmail.com>; Date: Mon, 21 Dec 2015 12:34:16 +0000; Well, I'm glad it wasn't the switch, as that would be a bear to fix. Hopefully the capacitor will resolve your issue. Then you can join us on 160 and listen to the awful conditions :o) Happy holidays; /archives//html/Topband/2015-12/msg00288.html (9,570 bytes)
10. Re: Topband: SB-1000 (score: 1): Author: Tim Shoppa <tshoppa@gmail.com>; Date: Mon, 21 Dec 2015 08:30:32 -0500; Jim - I recently had the failure of a 170pF doorknob in an Ameritron AL-1500 160M padding section. Replacements readily available: http://www.ameritron.com/Product.php?productid=290-0170-7 I believe; /archives//html/Topband/2015-12/msg00289.html (9,155 bytes)
11. Re: Topband: SB-1000 (score: 1): Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>; Date: Mon, 21 Dec 2015 09:30:55 -0400; If you can't find the exact value of 170pf the ceramic 5KV door knobs at 200pf will work. Better yet even a couple of 500pf door knobs in series will give you 250 pf which will just mean a little les; /archives//html/Topband/2015-12/msg00290.html (8,753 bytes)
12. Re: Topband: SB-1000 (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Mon, 21 Dec 2015 09:21:28 -0500; If you can't find the exact value of 170pf the ceramic 5KV door knobs at 200pf will work. Better yet even a couple of 500pf door knobs in series will give you 250 pf which will just mean a little les; /archives//html/Topband/2015-12/msg00291.html (9,150 bytes)
13. Re: Topband: SB-1000 (score: 1): Author: Herbert Schoenbohm <herbs@vitelcom.net>; Date: Mon, 21 Dec 2015 11:26:44 -0400; Tom is correct as usual but if you want to get the rig working for the Stew coming up a junk box substitute may get you on the air until the exact replacement arrives. Herb, KV4FZ If you can't find t; /archives//html/Topband/2015-12/msg00292.html (9,476 bytes)
14. Re: Topband: SB-1000 (score: 1): Author: Jim Murray via Topband <topband@contesting.com>; Date: Mon, 21 Dec 2015 17:03:42 +0000 (UTC); Thanks to all for info on the capacitor. The only place I had checked was rf parts but have not ordered yet. Also wanted to come up with a #8 brass washer. I'll go with a new original cap from Ame; /archives//html/Topband/2015-12/msg00293.html (8,598 bytes)
15. Re: Topband: SB-1000 (score: 1): Author: K4OWR <k2owr@comcast.net>; Date: Mon, 21 Dec 2015 12:47:03 -0500; of all sorts. I was able to replace the doorknob caps in my AL82 easily. BTW, keep extras on hand for 160 because you will need more eventually. Simply enter exactly what you're looking for and you'; /archives//html/Topband/2015-12/msg00294.html (9,090 bytes)
16. Re: Topband: SB-1000 (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Mon, 21 Dec 2015 19:05:06 -0500; Thanks to all for info on the capacitor. The only place I had checked was rf parts but have not ordered yet. Also wanted to come up with a #8 brass washer. I'll go with a new original cap from Amerit; /archives//html/Topband/2015-12/msg00296.html (9,235 bytes)
17. Topband: SB-1000 (score: 1): Author: Jim Murray via Topband <topband@contesting.com>; Date: Tue, 22 Dec 2015 01:52:31 +0000 (UTC); Both are N750 types. You need a #6 lug, a short #6 screw (3/16th long), and some #16 bus wire plus a brass washer that Ameritron will have. The chokes come from Ameritron no matter where you buy t; /archives//html/Topband/2015-12/msg00297.html (8,725 bytes)
18. Re: Topband: SB-1000 (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Mon, 21 Dec 2015 21:34:06 -0500; Both are N750 types. You need a #6 lug, a short #6 screw (3/16th long), and some #16 bus wire plus a brass washer that Ameritron will have. The chokes come from Ameritron no matter where you buy them; /archives//html/Topband/2015-12/msg00298.html (11,720 bytes)

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