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References: [ +from:rbonner@qro.com: 226 ]

Total 226 documents matching your query.

41. Re: [Amps] 3CX3000 Tuned Input Calibration (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Thu, 26 Oct 2006 12:51:42 -0500
Yes Tom might be closer with the 60 ohms, I've been working in YC-156's lately, massive B+ hits, brain failures, cellular destruction, beer consumption, standard ham stuff. I've got a couple 3 By 3 p
/archives//html/Amps/2006-10/msg00288.html (9,680 bytes)

42. Re: [Amps] High Temp Silicon Rubber -- Where to buy? (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Mon, 30 Oct 2006 15:27:05 -0600
If somebody has an Alpha 77 out there and they can pop the top off? I'm sure there is the manufacturers name somewhere on the rubber of the tube chimneys. Once you have the name like "Trojan Rubber C
/archives//html/Amps/2006-10/msg00304.html (10,118 bytes)

43. Re: [Amps] drill bits (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Mon, 30 Oct 2006 16:05:26 -0600
WOW Carl, while not a master machinist I have run into this issue before. If your plate is hardened you have an issue drilling it in the first place. First you need to chuck up smaller drill to make
/archives//html/Amps/2006-10/msg00307.html (8,385 bytes)

44. Re: [Amps] drill bits (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Tue, 31 Oct 2006 21:43:36 -0600
I think its time to use the Torch Instead may I recommend an ARC WELDER? OK so this CBer I was working "with" in the olden days starts telling me a story. It was 1971 and he had just bought a new to
/archives//html/Amps/2006-10/msg00329.html (11,170 bytes)

45. Re: [Amps] Henry 3K trouble (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 1 Nov 2006 07:29:30 -0600
Brian, I don't have a 3K Classic here or a manual for it, however I do have 3006, 3002 and 3004 which look like the same PS. When your B+ took the shot to ground it will instantaneously try to BRING
/archives//html/Amps/2006-11/msg00006.html (10,271 bytes)

46. Re: [Amps] Henry 3K trouble (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 1 Nov 2006 09:40:06 -0600
OK Brian, Yes well 1/4" should be far enough at under 5KV, but who knows what sort of spikes happen in there. There might be a cold solder joint at the choke that is FURRING UP with ozone and once io
/archives//html/Amps/2006-11/msg00009.html (15,889 bytes)

47. Re: [Amps] Henry 3K trouble (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 1 Nov 2006 18:34:16 +0000
I agree. Bob dd Sent From Mobile Device This diode is meant to handle the current surge, not be destroyed by it. Many older amps use "1-amp" diodes like the 1N4001-4007 series, which don't have a hig
/archives//html/Amps/2006-11/msg00012.html (9,336 bytes)

48. Re: [Amps] Heath SB220 Zener Replacement (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 1 Nov 2006 16:01:24 -0600
The cathode of the diode string goes towards the cathode of the tube. The 5 diodes would ZENER at about 3 volts. I'd rather use a 5 volt zener. I think Radio Shack carries some NO WATTAGE Zeners Put
/archives//html/Amps/2006-11/msg00015.html (8,614 bytes)

49. Re: [Amps] Henry 3K trouble (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 1 Nov 2006 17:53:38 -0600
--Original Message-- From: Robert B. Bonner [mailto:rbonner@qro.com] Sent: Wednesday, November 01, 2006 5:46 PM To: 'Tom W8JI' Subject: RE: [Amps] Henry 3K trouble Yes you are right Tom, I was way to
/archives//html/Amps/2006-11/msg00022.html (8,944 bytes)

50. Re: [Amps] 822 and Johnson 211 Sockets (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Sat, 4 Nov 2006 19:01:27 -0600
The 822 is a 200 watt general purpose triode that has a mu of 30 with full ratings to 20 Mhz. An identical tube, the Taylor 814, has a mu of 12. A later version, the 822S, has a side grid terminal an
/archives//html/Amps/2006-11/msg00070.html (7,920 bytes)

51. Re: [Amps] Tubes and other Amp stuff (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Mon, 6 Nov 2006 06:04:25 -0600
I think you'd be better off doing and inventory and posting. I have recently come into a large inventory of Amp Parts and tubes collected for 25 years by an avid builder If you are looking for parts
/archives//html/Amps/2006-11/msg00083.html (7,552 bytes)

52. Re: [Amps] pi filter QBL 5/3500 (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Mon, 6 Nov 2006 13:19:45 -0600
Maybe I'm missing something here. I didn't take the time to calculate your actual plate impedance. It will be high, which will lower the C requirements. Even said with my experience, that 300 pf tune
/archives//html/Amps/2006-11/msg00089.html (9,676 bytes)

53. Re: [Amps] AMERITRON AMP FACTORY WIRING ERROR (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Tue, 7 Nov 2006 13:03:24 -0600
Lou, This is really good INFO. I ran into one of these amplifiers JUST LAST WEEK. A very prominent list owner IM'ed me with this situation. BOB, I have high grid current and no power output... Whoa s
/archives//html/Amps/2006-11/msg00106.html (9,197 bytes)

54. Re: [Amps] class "A" RF amp question (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 8 Nov 2006 13:28:31 -0600
AM develops PEP of 4 times the carrier power at 100% modulation. This is your 375 - 1500 PEP relationship. Your "flat topping" is not caused by the AMP running B or AB and overmodulating, it would be
/archives//html/Amps/2006-11/msg00121.html (9,629 bytes)

55. Re: [Amps] class "A" RF amp question (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 8 Nov 2006 13:39:57 -0600
IN case my answer wasn't adequate and you wanted a calculation... 1500 OUTPUT PEP including the power lost to the conversion. If you say 50% efficiency in a class A (people can argue either side of t
/archives//html/Amps/2006-11/msg00123.html (9,144 bytes)

56. Re: [Amps] class "A" RF amp question (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 8 Nov 2006 15:05:18 -0600
Thanks Tom... BOB A linear amplifier is also sometimes called "efficiency modulation". What happens is this: 100% modulated AM requires PEP to be four times the carrier power. This occurs in a plate
/archives//html/Amps/2006-11/msg00129.html (10,609 bytes)

57. Re: [Amps] AL-572 Negative grid current? (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Sat, 11 Nov 2006 12:56:45 -0600
Scott one of your tubes might have a grid cathode short. Remove one at a time to find the offender. BOB DD Hi Ampers, I bought a used Ameritron AL-572 in June and have just been able to check it out
/archives//html/Amps/2006-11/msg00149.html (8,599 bytes)

58. Re: [Amps] History of Amps (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Tue, 14 Nov 2006 15:13:51 -0600
NO! We control the horizontal - We control the vertical Independent thought privileges were revoked in MO during the last election. Please read current regulations to this effect. Sincerely, Your Gov
/archives//html/Amps/2006-11/msg00173.html (9,847 bytes)

59. Re: [Amps] Class A for AM (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Tue, 14 Nov 2006 20:16:26 -0600
Hey Tom, isn't that why they went to PUSH PULL finals with a link coupled output? Still simulates class A with a pair of class B finals... I think a couple nice 4-1000's glowing in the rack should ju
/archives//html/Amps/2006-11/msg00181.html (10,274 bytes)

60. Re: [Amps] Russian power L-coupler (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Fri, 17 Nov 2006 15:25:21 -0600
Yeah, why use a ball of wire for an inductor when you can bend up some serious water pipe to do the same thing? I don't think everyone has a grasp of how poor that design is for wide range inductance
/archives//html/Amps/2006-11/msg00226.html (10,982 bytes)

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