Mail Archive Search: <+from:k7fm at teleport.com>

Results:

References: [ +from:k7fm: 806 ] [ at (Too many documents hit. Ignored) ] [ teleport.com: 37 ]

Total 37 documents matching your query.

1. [Amps] Can I run 4-400's in TL922 (score: 184): Author: k7fm at teleport.com (k7fm); Date: Fri Jun 6 09:12:31 2003; "2. Increase the anode PS potential by c. 500v in order raise the ZSAC to the needed 75mA/tube in order to achieve SSB linearity. To do this, add a 200Vrms or so 1A tranformer secondary winding, in-p; /archives//html/Amps/2003-06/msg00031.html (7,792 bytes)
2. [Amps] New, 60m band question (score: 184): Author: k7fm at teleport.com (k7fm); Date: Wed Jun 11 08:09:12 2003; Not only is there an amplifier band with 50 watts ERP, the stability and bandwidth restrictions are such that you may not be able to just take any rig and put it on, without attention to detail. No A; /archives//html/Amps/2003-06/msg00065.html (8,012 bytes)
3. [Amps] New, 60m band question (score: 184): Author: k7fm at teleport.com (k7fm); Date: Wed Jun 11 08:09:29 2003; 1.5 kw into a dummy load should have less than 50 watts ERP and be a great match. Possibly, phased dummy loads will give you a bit of gain Colin K7FM -- Outgoing mail is certified Virus Free. Checked; /archives//html/Amps/2003-06/msg00070.html (7,317 bytes)
4. [Amps] SELL:3cx10,000a7,socket and chimmney. (score: 184): Author: k7fm at teleport.com (k7fm); Date: Fri Jun 13 08:31:43 2003; Hi Bob: It is a home made transformer using an old toilet plunger as a core. Only 10% efficient. Maybe you are the guy mentioned in the following news report:: At Heathrow Airport today, an individua; /archives//html/Amps/2003-06/msg00078.html (7,556 bytes)
5. [Amps] 4 x 807 amp (score: 184): Author: k7fm at teleport.com (k7fm); Date: Sun Jun 15 09:20:48 2003; "A final note on this issue: 1625's are 807's with 12.6V filament, all other parameters are the same. 73's Sam HS0ZDY" Almost - but not quite Some of the 1625 tubes were manufactured with a wire conn; /archives//html/Amps/2003-06/msg00093.html (7,413 bytes)
6. [Amps] Amps Reflector (score: 184): Author: k7fm at teleport.com (k7fm); Date: Sun Mar 2 17:01:12 2003; Regarding the "discussions" between two individuals, one other possibility (other than two personalities fighting it out over pointless matters) is that one of the persons is wrong and the other one; /archives//html/Amps/2003-03/msg00031.html (7,420 bytes)
7. [Amps] Use of Manual T/R Switches (score: 184): Author: k7fm at teleport.com (k7fm); Date: Thu Mar 6 09:15:41 2003; The T/R switch can be a point of concern, as you pointed out. The problem with a knife switch, however, is after the operator has had too much Corona. Best solution is to eliminate the T/R switch alt; /archives//html/Amps/2003-03/msg00255.html (8,524 bytes)
8. [Amps] B & W Amp (score: 184): Author: k7fm at teleport.com (k7fm); Date: Sat Mar 8 08:53:18 2003; Hello John: Well, I sort of do have experience. I built a home built copy, which I used for many years. It is a reliable amp, but there are some considerations. First, the plate dissipation of the 81; /archives//html/Amps/2003-03/msg00332.html (7,207 bytes)
9. [Amps] Ameritron AL-80B - Alternative? (score: 184): Author: k7fm at teleport.com (k7fm); Date: Sun Mar 9 12:20:27 2003; Rich stated: ". The farther out an apologist gets out on a limb, the more he/she seems to write." Is this why Rich is the volume leader on the Amps reflector? Is he admitting he is an apologist? And,; /archives//html/Amps/2003-03/msg00377.html (8,361 bytes)
10. [Amps] A WAR STORY! (score: 184): Author: k7fm at teleport.com (k7fm); Date: Sun Mar 9 13:55:42 2003; The following story is true. It is mentioned here because it may be relevant to why people believe low Q parasitic suppressors are the leading protectors from amplifier destruction. It is a war story; /archives//html/Amps/2003-03/msg00382.html (9,347 bytes)
11. [Amps] Parasitic Oscillations in RF Amplifiers (score: 184): Author: k7fm at teleport.com (k7fm); Date: Tue Mar 11 22:52:40 2003; It might be interesting to see what was said in the 1938 Radio Handbook: "Parasitics are undesireable oscillations either of very high or very low frequencies which occur in radio-frequency amplifier; /archives//html/Amps/2003-03/msg00463.html (9,911 bytes)
12. [Amps] Parasitic Oscillations in RF Amplifiers (score: 184): Author: k7fm at teleport.com (k7fm); Date: Wed Mar 12 09:38:03 2003; "Any very simple diagnosis or theory, even if wrong, makes many people comfortable and satisfies them. This makes it appear that anyone with an antalytical approach is just "causing problems" except; /archives//html/Amps/2003-03/msg00469.html (9,998 bytes)
13. [Amps] reading 8-10kv with a digital multimeter? (score: 184): Author: k7fm at teleport.com (COLIN LAMB); Date: Fri Mar 14 12:24:39 2003; Hi Gary: An easy test of the diodes is to use a 9 volt battery and use one of the diodes in series with the battery lead. Measure the resulting voltage on the voltage range. The voltage drop from 9 v; /archives//html/Amps/2003-03/msg00553.html (7,136 bytes)
14. [Amps] pi-net tanks (score: 184): Author: k7fm at teleport.com (k7fm); Date: Sat Mar 15 09:46:05 2003; "However, was it serendippity or good engineering practice by someone who had taken a course in AC circuit-analysis?" Rich, on numerous occasions, you have argued that someone a certain individual no; /archives//html/Amps/2003-03/msg00577.html (8,464 bytes)
15. [Amps] pi-net tanks (score: 184): Author: k7fm at teleport.com (k7fm); Date: Sat Mar 15 15:47:34 2003; "The same person said that Ni-Cr alloys have less RF resistance as frequency increases. Do you believe this, Colin?" Rich, I do not know if that was said, or if the statement was in context. Since I; /archives//html/Amps/2003-03/msg00588.html (8,494 bytes)
16. [Amps] pi-net tanks (score: 184): Author: k7fm at teleport.com (k7fm); Date: Sat Mar 15 20:22:01 2003; "A person on this group who professed that AC circuit-analysis does not apply to VHF R/L suppressors [reference available on request], subsequently mentioned that he had not taken a course in AC circ; /archives//html/Amps/2003-03/msg00592.html (7,945 bytes)
17. [Amps] Silly idea? (score: 184): Author: k7fm at teleport.com (k7fm); Date: Tue Mar 18 16:17:46 2003; "** Those who are chagrined by (personal attacks) it despise history". Rich, I do not like personal attacks and I like history. What has history got to do with personal attacks. And, what has this go; /archives//html/Amps/2003-03/msg00685.html (7,557 bytes)
18. [Amps] 5 KW Heath SB-220 (score: 184): Author: k7fm at teleport.com (k7fm); Date: Wed Mar 19 09:43:25 2003; For those who have interest, there is a Heath SB-220 that has been converted to run "over 5KW output" selling on eBay. It is Item # 3013914092 I just report this stuff. Colin K7FM -- Outgoing mail is; /archives//html/Amps/2003-03/msg00703.html (7,030 bytes)
19. [Amps] TL922A and AL80A (score: 184): Author: k7fm at teleport.com (k7fm); Date: Wed Mar 19 22:39:32 2003; Rich replied: "** Not in my copy of "Care and Feeding ..." Rich, it is in my copy. Page 68 of the third printing,1978, under 4.3.2 What Makes a Tube Linear. Seems to me that was one of the points of; /archives//html/Amps/2003-03/msg00723.html (8,101 bytes)
20. [Amps] Hard-drive Dive (score: 184): Author: k7fm at teleport.com (k7fm); Date: Fri Mar 21 22:11:32 2003; "The orders I entered in the computer this week were lost when the hard drive went kaput on 20-March." Rich, since I installed a nichrome grounding wire from the hard drive case to the computer case,; /archives//html/Amps/2003-03/msg00766.html (7,617 bytes)

Current List: 1 - 20
Page: [1] [2]