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References: [ +from:kevin.stover@mediacombb.net: 28 ]

Total 28 documents matching your query.

1. Re: [Amps] 8877 (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Sun, 18 Nov 2012 08:35:51 -0600
Alpha uses the 8877 in the 9500. I assume Eimac. They use a pair of 4CX1000A Chinese knockoffs in the 8410 manual tune amp. They use a 4CX1500B, I assume Chinese, in the 8406 6m amp. OTOH Ive had no
/archives//html/Amps/2012-11/msg00116.html (10,975 bytes)

2. Re: [Amps] Using old amps on WARC query (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Sun, 30 Jun 2013 07:44:32 -0500
If I'm not mistaken the Titan, model 425, was designed "WARC ready". It needed a mod to make it work above 23MHz but you say the mod has been done. On 6/30/2013 6:39 AM, Charles Harpole wrote: Please
/archives//html/Amps/2013-06/msg00274.html (8,086 bytes)

3. Re: [Amps] ALS-600 vs ALS-1300 (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Thu, 10 Apr 2014 16:06:52 -0500
You are correct. The problem was with the 12V supply, not the 50V supply. Those problems have been eliminated for the most part. The 1300 suffered from a lot of growing pains and bad reviews, thus th
/archives//html/Amps/2014-04/msg00125.html (8,092 bytes)

4. Re: [Amps] ALS-600 vs ALS-1300 (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Thu, 17 Apr 2014 07:53:31 -0500
The 600's do work well. The MRF-150 is a tried and true FET. The only problem anybody ever complained about on the 1300 was the low voltage (12V) power supply. It had a ridiculous failure rate for ab
/archives//html/Amps/2014-04/msg00160.html (9,807 bytes)

5. Re: [Amps] Using computer CPU coolers on GI46b triode ? (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Fri, 09 May 2014 07:04:19 -0500
On 5/9/2014 5:40 AM, Jonathan White wrote: Hi. Can anyone care to give any thoughts on using this tube sold without its cooler, the seller said Russian hams were using CPU heat exchangers, with cooli
/archives//html/Amps/2014-05/msg00036.html (8,861 bytes)

6. Re: [Amps] Arctic Silver with and without silver (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Fri, 06 Feb 2015 07:08:35 -0600
I have always used thick business card stock as a trowel to spread the AS on CPU heat spreaders. A very thin smooth layer of AS that you can see through is all that's needed. Too thick a layer actual
/archives//html/Amps/2015-02/msg00074.html (11,362 bytes)

7. Re: [Amps] Ameritron availability (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Wed, 25 Feb 2015 17:50:17 -0600
I'll bet Ameritron builds the 1300 and 1306 on the same production line and builds them in batches. I'll also bet the 1306 is out selling the 1300. Ameritron blames production difficulties. Does that
/archives//html/Amps/2015-02/msg00152.html (8,798 bytes)

8. Re: [Amps] Arctic Silver (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Sat, 11 Apr 2015 09:21:10 -0500
Correct on all points. If after securing the transistor to the heat sink or heat sink to a processor you see heatsink compoung oozing out the sides you've used waaay to much. The layer of heatsink co
/archives//html/Amps/2015-04/msg00063.html (8,065 bytes)

9. Re: [Amps] Considering an ALS-1306 (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Fri, 24 Apr 2015 18:14:08 -0500
If I'm not mistaken the designer of the amp is using one with a K3 remotely, and he can run any Ameritron amp he wants. IMHO Elecraft messed up when they stopped at 500W with the KPA500. There are a
/archives//html/Amps/2015-04/msg00156.html (8,685 bytes)

10. Re: [Amps] Considering an ALS-1306 (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Fri, 24 Apr 2015 18:45:16 -0500
I'll take your word for it. I don't know of any solid state 1KW amp that doesn't derate the power out for constant key down modes like RTTY, AM, and FM. I believe the KPA 500 is derated to no more th
/archives//html/Amps/2015-04/msg00158.html (8,442 bytes)

11. Re: [Amps] Considering an ALS-1306 (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Fri, 24 Apr 2015 18:50:45 -0500
I forgot to add that Ameritron also derates the AL-1500 to no more than half an hour at full power. Alpha is famous for the "brick on the key". Who's right? -- R. Kevin Stover AC0H __________________
/archives//html/Amps/2015-04/msg00159.html (8,911 bytes)

12. Re: [Amps] Considering an ALS-1306 (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Fri, 24 Apr 2015 19:52:20 -0500
When you buy the K3 to KPA500 interface cable running the pair makes the K3 in efferct a 500W transciever. You can change bands on the rig from the amp.,If the KPA is in Operate mode it will remember
/archives//html/Amps/2015-04/msg00161.html (11,225 bytes)

13. Re: [Amps] ALS-1306 (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Thu, 30 Apr 2015 18:08:51 -0500
I think you masde a good decision. Don't get me wrong...I love my Elecraft "stuff" but think when it comes down to it the KPA500 should have been the KPA1K. That's where the solid state competition i
/archives//html/Amps/2015-04/msg00183.html (7,773 bytes)

14. Re: [Amps] Time for New Power Meter (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Tue, 5 May 2015 08:05:38 -0500
I may be late to this dance but isn't that why they sell more than one slug at different power ratings? A 2500W slug could be off by +/- 125W, a 100W slug would be off by +/-5W anywhere on the meter.
/archives//html/Amps/2015-05/msg00081.html (12,130 bytes)

15. Re: [Amps] SPE 2K RTTY Duty Cycle (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Fri, 22 May 2015 07:58:01 -0500
There are NO 12V final amateur transceivers that make -40dB IM3, none. Never have been, never will be. The best are at -33 to -35. Those transceivers capable of 200 Watts are all usinng 28 or 50V fin
/archives//html/Amps/2015-05/msg00143.html (9,518 bytes)

16. Re: [Amps] SPE 2K RTTY Duty Cycle (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Fri, 22 May 2015 17:21:23 -0500
**Easy answer, type acceptance. The marine rigs are type accepted and Ham rigs aren't. Ham rigs only have to meet the -43 and -60 dB harmonic test. There is no FCC reuqirement for IM3 testing of Ham
/archives//html/Amps/2015-05/msg00161.html (9,213 bytes)

17. Re: [Amps] SPE 2K RTTY Duty Cycle (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Fri, 22 May 2015 17:23:27 -0500
There is no economic or regulatory impetus to make the manufacturers build rigs like that so the point is moot. -- R. Kevin Stover AC0H _______________________________________________ Amps mailing li
/archives//html/Amps/2015-05/msg00162.html (9,478 bytes)

18. Re: [Amps] SPE 2K RTTY Duty Cycle (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Sat, 23 May 2015 18:06:33 -0500
There is a receiver biasat the cost of terrible transmit performance. Whe is the last time the ARRL called oput a manufacturer for producing a transmitter that can't get -30dB IM3? I don't ever recal
/archives//html/Amps/2015-05/msg00176.html (11,265 bytes)

19. Re: [Amps] Real danger to use the ORANGE button (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Mon, 25 May 2015 07:53:44 -0500
I did this with my TS-520 back in the mid 90's when I started running PSK31 and RTTY. A 9V battery connected to the outside connections on a 10K linear taper pot built in an Altoids tin. Tuner the 52
/archives//html/Amps/2015-05/msg00197.html (9,015 bytes)

20. Re: [Amps] Amp output power (score: 1)
Author: Kevin Stover <kevin.stover@mediacombb.net>
Date: Sun, 23 Aug 2015 09:13:09 -0500
Going through the CPII datasheet for the 3CPX800 we see max plate voltage of 4500V so the tubes will handle the voltage. The tube still has the dainty 4W max dissipation grid so if you hit it with 36
/archives//html/Amps/2015-08/msg00075.html (8,011 bytes)

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