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Total 25 documents matching your query.

1. [AMPS] What (modern) tube to use? (score: 1): Author: W8IK@ibm.net (Joe Subich, W8IK/4); Date: Thu, 18 Feb 1999 15:54:11 -0500; The recent "amps" discussion of which tube to use for building a new CW amplifier started me thinking ... If one were building a new amplifier (or buying one of the new commercial units) what tube or; /archives//html/Amps/1999-02/msg00475.html (8,968 bytes)
2. [AMPS] What (modern) tube to use? (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 18 Feb 1999 14:55:26 -0800; ? Filament-current is a mere 75A. Dahl makes a compact transformer. Tube handles are mighty nice. 8171s are typically a good buy in the surplus market. They can be had for under 6-cents per watt. -; /archives//html/Amps/1999-02/msg00479.html (9,054 bytes)
3. [AMPS] What (modern) tube to use? (score: 1): Author: n1rj@pivot.net (Roger D. Johnson); Date: Thu, 18 Feb 1999 18:07:09 -0500; I prefer an "instant on" type of tube. With Packetcluster most everywhere, it's amazing how big a pileup can get while waiting for that 3 minute warm-up! I've also found that tuning tetrode amps for; /archives//html/Amps/1999-02/msg00481.html (8,300 bytes)
4. [AMPS] What (modern) tube to use? (score: 1): Author: W8IK@ibm.net (Joe Subich, W8IK/4); Date: Thu, 18 Feb 1999 18:26:51 -0500; OK ... I looked at my Varian catalog and the 103 Amps was for the "J" version of the 4CX5000/4CX1000. Still, the requirements for filament power, air socket and air flow are a bit stiff for the amat; /archives//html/Amps/1999-02/msg00482.html (8,970 bytes)
5. [AMPS] What (modern) tube to use? (score: 1): Author: phil@vaxxine.com (Phil T. (VE3OZZ)); Date: Thu, 18 Feb 1999 20:03:26; Joe, I've always been intrigued by the 3CX5000A7 and 3CX10,000B7 but Ive yet to find a surplus one. These require no socket (bolt directly to chassis), and the heaters draw less current than a pair o; /archives//html/Amps/1999-02/msg00484.html (9,969 bytes)
6. [AMPS] What (modern) tube to use? (score: 1): Author: irosky@yahoo.com (igor rosky); Date: Thu, 18 Feb 1999 18:19:21 -0800 (PST); I would use a 4c5000/10000 as rich suggested at half plate volts, look at the price of the 4cx1600, the 4cx10000 is a bargain even new, and has a "A" type warranty, you can aslo have them rebuilt. Ha; /archives//html/Amps/1999-02/msg00488.html (11,629 bytes)
7. [AMPS] What (modern) tube to use? (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Fri, 19 Feb 1999 00:47:44 -0500; Joe Subich's note about which tube to use hit the nail on the head. W3LPL's recent post looking for 3-1000Zs illustrated how Eimac's exit from the glass tube market narrows our choices immensely. One; /archives//html/Amps/1999-02/msg00490.html (12,137 bytes)
8. [AMPS] What (modern) tube to use? (score: 1): Author: w6ru@lightspeed.net (Terry Gaiser); Date: Thu, 18 Feb 1999 23:09:43 -0800; David, Consider the 3CX1200A7. This IS a 3-1000Z in a ceramic-metal package. A very rugged, instant on, tube. Terry W6RU -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contest; /archives//html/Amps/1999-02/msg00491.html (13,749 bytes)
9. [AMPS] What (modern) tube to use? (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 19 Feb 1999 01:29:23 -0800; ? Due to its 7" cooler, the blower requirements for the 8171 in amateur service are virtually a piece of cake. The chassis space is the same as for a 4-1000A/8166. ? As you like it. . With 2.5kVDC,; /archives//html/Amps/1999-02/msg00492.html (10,049 bytes)
10. [AMPS] What (modern) tube to use? (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 19 Feb 1999 01:30:00 -0800; ? Hardly. Load the tetrode to yield the mfg. specified screen current. Peak the screen current with C-Tune. Finis. Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: h; /archives//html/Amps/1999-02/msg00493.html (9,504 bytes)
11. [AMPS] What (modern) tube to use? (score: 1): Author: W8IK@ibm.net (Joe Subich, W8IK/4); Date: Fri, 19 Feb 1999 09:21:31 -0500; Terry, The 3CX1200A7 (instant on, reasonable drive/gain, etc.) is certainly an interesting tube but I'm concerned that the only commercial user seems to be Ameritron and I have my doubts about the lo; /archives//html/Amps/1999-02/msg00499.html (9,598 bytes)
12. [AMPS] What (modern) tube to use? (score: 1): Author: sbookout@mnsinc.com (Steve); Date: Fri, 19 Feb 1999 09:52:35 -0500; Hello all, Henry has been using this tube in some of there amps since the mid 80's. 73 de Steve, NJ4F -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrat; /archives//html/Amps/1999-02/msg00501.html (10,698 bytes)
13. [AMPS] What (modern) tube to use? (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Fri, 19 Feb 1999 10:14:45 -0500; I agree wholeheartedly with Terry about the 3CX1200A7. It has all the best characteristics of the 3-1000Z. Surprisingly, its an easy retrofit for a 3-1000Z amp too. Its not readily apparent unless yo; /archives//html/Amps/1999-02/msg00503.html (11,137 bytes)
14. [AMPS] What (modern) tube to use? (score: 1): Author: W8IK@ibm.net (Joe Subich, W8IK/4); Date: Fri, 19 Feb 1999 10:34:02 -0500; Look carefully at Radiodan's Henry page ... the only desktop amplifier capable of 160-10 meters using the 3CX1200A7 is only rated a 750 watts DC (carrier). That doesn't even put Henry in the serious; /archives//html/Amps/1999-02/msg00504.html (10,295 bytes)
15. [AMPS] What (modern) tube to use? (score: 1): Author: w6ru@lightspeed.net (Terry Gaiser); Date: Fri, 19 Feb 1999 07:40:31 -0800; Understand your concern Joe. Henry has been producing am amplifier or two with this tube to this day since it was introduced by Eimac. Best Regards, Terry W6RU -- FAQ on WWW: http://www.contesting.co; /archives//html/Amps/1999-02/msg00505.html (10,180 bytes)
16. [AMPS] What (modern) tube to use? (score: 1): Author: W8IK@ibm.net (Joe Subich, W8IK/4); Date: Fri, 19 Feb 1999 10:54:30 -0500; Commented on the Henry designs elsewhere ... The 4-400 is a rather special case. It's primary niche was in 1 and 2.5 KW AM broadcast transmitters. With the cost to retube a transmitter pushing $2 K; /archives//html/Amps/1999-02/msg00506.html (10,592 bytes)
17. [AMPS] What (modern) tube to use? (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 19 Feb 1999 13:48:46 -0800; ? 8171s with ok emission and cosmetic probs. can be had for a few hundred dollars. I paid $75 for a surplus sk300a socket. If one spent $600 for a tube and socket, the cost is $30 per kW pep when th; /archives//html/Amps/1999-02/msg00509.html (10,474 bytes)
18. [AMPS] What (modern) tube to use? (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Fri, 19 Feb 1999 23:17:21 -0500; On Thu, 18 Feb 1999 15:54:11 -0500 "Joe Subich, W8IK/4" <W8IK@ibm.net> writes: For an indestructible amp at 1500W out and 100W drive do not overlook the 3CX3000A7 or the 3CPX5000A7/YC-156. Yes the fo; /archives//html/Amps/1999-02/msg00519.html (11,360 bytes)
19. [AMPS] What (modern) tube to use? (score: 1): Author: W8IK@ibm.net (Joe Subich, W8IK/4); Date: Sat, 20 Feb 1999 00:10:02 -0500; Still, 550 watts of filament power and 120 to 150 CFM of airflow (Svetlana data sheets) seem a bit hefty for an amateur amateur amplifier. Of course, it looks like one of the 200 watt rigs will driv; /archives//html/Amps/1999-02/msg00522.html (9,440 bytes)
20. [AMPS] What (modern) tube to use? (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 20 Feb 1999 05:43:22 -0800; ? People purchase automobiles that will go faster than the 65 miles per hour speed limit. My wife drives one that will go 3db faster. The 8171/4CX10,000D can be run at 10db gain or 20db gain. Howeve; /archives//html/Amps/1999-02/msg00527.html (9,726 bytes)

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