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Total 210 documents matching your query.

41. Re: [Amps] Audio BW, *WAS* Centurion cooling improvement ... (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Thu, 26 Aug 2004 17:10:26 -0700 (PDT)
This is a falacy. My DSP rig does not allow any significant energy in the opposite sideband. However, when there is enough low frequency content, it can sound like a carrier when you tune through the
/archives//html/Amps/2004-08/msg00361.html (18,766 bytes)

42. Re: [Amps] Centurion cooling improvement ideas for AM service (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Thu, 26 Aug 2004 17:29:57 -0700 (PDT)
Problem is that most clowns (including a few here, I'm sure) don't know to properly use their amps, so a 2.4 kHz audio passband easily becomes 10 kHz or more. Now tell me how "bad" a properly run 4 o
/archives//html/Amps/2004-08/msg00362.html (22,523 bytes)

43. Re: [Amps] Audio BW, *WAS* Centurion cooling... (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Thu, 26 Aug 2004 17:51:51 -0700 (PDT)
My rig uses DSP generated sidebands. It would be very difficult to create the kind of situation you suggest. But as you have audio content closer to the carrier point, the receiving station percieves
/archives//html/Amps/2004-08/msg00365.html (13,157 bytes)

44. [Amps] Audio BW -- Please just let us operate!! (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Thu, 26 Aug 2004 18:26:32 -0700 (PDT)
I decided to break this out separately because I've heard this same story over and over and over again. Anyone running some extended low-end content is "wide". I already stated this before, but "bass
/archives//html/Amps/2004-08/msg00366.html (9,199 bytes)

45. Re: [Amps] Audio BW, *WAS* Centurion cooling... (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Thu, 26 Aug 2004 18:44:16 -0700 (PDT)
Simple. Because a "Normal" SSB signal doesn't contain enough audio content below 100Hz or so to create the effect. I have access to several types of analyzers such as HP (or Agilent), Rohde & Schwart
/archives//html/Amps/2004-08/msg00371.html (16,351 bytes)

46. Re: [Amps] AM (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Fri, 27 Aug 2004 05:14:49 -0700 (PDT)
Actually, "Ultra Wide Band" was done with a key (Spark Gap). __________________________________ Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. http://promotions.yahoo.com/new
/archives//html/Amps/2004-08/msg00376.html (10,212 bytes)

47. Re: [Amps] Centurion cooling improvement ideas for AM service (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Fri, 27 Aug 2004 05:21:39 -0700 (PDT)
Right. If I had to manually generate the 6kW necessary to power my 3K-A, I'm sure I'd either be in really good shape or using an FT-817. Is this not the "Amps" reflector??? __________________________
/archives//html/Amps/2004-08/msg00377.html (11,318 bytes)

48. Re: [Amps] AM and Speech Processors ... (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Fri, 27 Aug 2004 16:43:59 -0700 (PDT)
The Administrator is right, and I appologize for starting this to those of you that would rather not have heard about it. The problem is that there really isn't a good forum to discuss this with a wi
/archives//html/Amps/2004-08/msg00414.html (9,248 bytes)

49. Re: [Amps] AM-6154 questions (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Tue, 14 Sep 2004 08:49:18 -0700 (PDT)
I haven't been following this, so I'm not sure how it got to "burning shorts", but I used to do the same thing with portable cell phone boards. Occasionally, we'd find an internal short in the 4 or 6
/archives//html/Amps/2004-09/msg00262.html (11,522 bytes)

50. RE: [BULK] - Re: [Amps] Applying HV during Warmup (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Fri, 17 Sep 2004 11:12:17 -0700 (PDT)
Correct me if I'm wrong, but doesn't the HV come up almost instantly after the amp is turned on? I use GLASS tubes, so I'm not an expert on these fancy ceramics, but I think the delay circuit keeps t
/archives//html/Amps/2004-09/msg00303.html (8,359 bytes)

51. Re: [Amps] Equalising resistors with HV diodes (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Tue, 21 Sep 2004 08:13:08 -0700 (PDT)
What's the procedure? Simply connect diodes to the tester at 1300V and only use the ones that don't smoke? :-) Joe, N3JI No, but the only practical way to limit reverse current to a safe value is to
/archives//html/Amps/2004-09/msg00380.html (9,202 bytes)

52. Re: [Amps] AL1200 (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Wed, 22 Sep 2004 08:42:36 -0700 (PDT)
If it's the input circuitry, you'd have high SWR when driving the amp -- are you seeing that? Joe, N3JI K9RT@aol.com wrote: Have a friend with an AL1200 that recently stopped transmitting on 80 meter
/archives//html/Amps/2004-09/msg00402.html (7,785 bytes)

53. RE: [BULK] - [Amps] Equalising resistors with HV diodes (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Wed, 22 Sep 2004 10:58:08 -0700 (PDT)
Oh yeah!! I forgot about those things. We had a Huntron Tracker that did that kind of graphic analysis of junction devices, caps, coils, etc. It was actually a pretty cool device. Joe, N3JI _________
/archives//html/Amps/2004-09/msg00411.html (8,431 bytes)

54. Re: [Amps] 3-500Z Recomendations (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Sat, 2 Oct 2004 02:35:54 -0700 (PDT)
The RF Parts/Taylor ZGs are excellent tubes. I've had mine nearly two years and they really take a beating!! I run mine mostly in AM in my Henry 3K-A and they just continue to pump out the power!! St
/archives//html/Amps/2004-10/msg00007.html (9,144 bytes)

55. Re: [Amps] Transformer shop update (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Wed, 6 Oct 2004 11:51:00 -0700 (PDT)
I agree, that's why I didn't buy it -- but I just checked my old email from Heyboer, and it was $200 plus shipping, not $300 (my mistake). It was supposedly a "Custom Wind", but it's hard to believe
/archives//html/Amps/2004-10/msg00067.html (21,373 bytes)

56. Re: [Amps] Mod xmfr (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Mon, 11 Oct 2004 07:57:13 -0700 (PDT)
Unless you're totally fixed on using the 813s (not a THING wrong with that, BTW!!), you might check out this site: http://www.classeradio.com/ I've been considering this for quite some time now and i
/archives//html/Amps/2004-10/msg00148.html (8,387 bytes)

57. Re: [Amps] Mod xmfr (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Mon, 11 Oct 2004 12:53:54 -0700 (PDT)
I know, I know... I've got a VikingII/HQ-170 paired up. There is something that equals more than the sum of the parts while operating the vintage gear. Joe, N3JI _______________________________ Do yo
/archives//html/Amps/2004-10/msg00159.html (8,096 bytes)

58. RE: [BULK] - Re: [Amps] Mod xmfr (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Mon, 11 Oct 2004 15:05:14 -0700 (PDT)
Wow!! You must've had to swamp the heck out of the Valiant to drive the T-bolt!! Even a Ranger needs swampped. It is kind of funny though: my SS rig AND power supply weighs less than 20 lbs. Then I d
/archives//html/Amps/2004-10/msg00164.html (8,093 bytes)

59. RE: [BULK] - RE: [BULK] - Re: [Amps] Mod xmfr (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Mon, 11 Oct 2004 16:21:42 -0700 (PDT)
Interesting -- learn something new every day. I didn't know you could do that!! How did you plate modulate the driver stage?? _______________________________ Do you Yahoo!? Declare Yourself - Registe
/archives//html/Amps/2004-10/msg00166.html (9,808 bytes)

60. Re: [Amps] Mod xmfr (score: 1)
Author: Joe Isabella <n3ji@yahoo.com>
Date: Mon, 11 Oct 2004 18:44:43 -0700 (PDT)
Thanks for the info... The Valiant should do about 150W AM carrier -- it had three 6146s for a final modulated by a pair of 6146s, after all. The Ranger is only good for 50-60WAM carrier, though -- i
/archives//html/Amps/2004-10/msg00168.html (13,878 bytes)

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