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161. Re: [Amps] QSK or not (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Thu, 23 Feb 2006 07:04:43 -0800 (PST); I use both the RF Gain and a slower AGC on the receiver. There is virtually NO noise between elements that way. Same with SSB -- it's better than squelch. I use a lot of attenuation, RF Gain, and a m; /archives//html/Amps/2006-02/msg00431.html (8,813 bytes)
162. Re: [Amps] QSK (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Thu, 23 Feb 2006 08:48:26 -0800 (PST); Do you use logging SW complete with DX Spots and rig & rotor control, too? See, now you can filter the DX spots so you only hear the ones you need. When the SW detects a spot, it will tune your rig t; /archives//html/Amps/2006-02/msg00441.html (9,167 bytes)
163. Re: [Amps] QSK (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Thu, 23 Feb 2006 11:08:26 -0800 (PST); Wow... I dunno... Maybe I -AM- being a little too "nostalgic". Unless you're really a quadriplegic, I would think that pushing a couple buttons on a keyboard to "work" and log DX equivelent to using; /archives//html/Amps/2006-02/msg00453.html (10,964 bytes)
164. Re: [Amps] QSK (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Thu, 23 Feb 2006 12:41:48 -0800 (PST); You really need to lighten up. What you don't see in that pic is my HB Viking II clone, Meck T-60, HQ-170, etc., etc. Be careful judging from a single pic on QRZ... And actually, the pic is a little; /archives//html/Amps/2006-02/msg00459.html (11,075 bytes)
165. Re: [Amps] QSK (okay, not QSK...) (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Thu, 23 Feb 2006 16:02:20 -0800 (PST); Really... I didn't suggest it was unsat. Nowhere. I was seriously grinning when I wrote that, but I can see some of you can't take something for what it's worth... A light-hearted statement. I didn't; /archives//html/Amps/2006-02/msg00474.html (11,908 bytes)
166. Re: [Amps] DIN stands for....? (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Fri, 24 Feb 2006 19:12:04 -0800 (PST); I just use lots of flux and tin both sides. Sometimes you have to scrape the plating off the pins, too. A real quick touch with the iron, and I'm done. The buggers are the 13 pin DINs that don't use; /archives//html/Amps/2006-02/msg00540.html (11,470 bytes)
167. Re: [Amps] Ameritron ALS-500M (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Wed, 15 Mar 2006 04:44:48 -0800 (PST); I have the older model (which I bought used last year). It's a great little amp! It WILL trip if SWR goes high, even for a very short time. I noticed mine kept tripping and I couldn't figure out why; /archives//html/Amps/2006-03/msg00384.html (8,871 bytes)
168. Re: [Amps] AM Downward Modulation (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Thu, 13 Apr 2006 13:56:28 -0700 (PDT); Make sure you turn the carrier down to no more than 25W (less, if you can -- I used to run 20W carrier max on my 100W rig). If you run more than that and 100% modulate, the PA doesn't have enough hea; /archives//html/Amps/2006-04/msg00233.html (9,144 bytes)
169. Re: [Amps] AM Downward Modulation (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Fri, 14 Apr 2006 07:48:45 -0700 (PDT); Yep -- my 950SDX is no different. If you just use the power adjusment, it actually lowers the entire power envelope and you gain nothing. The key is having the 100W (150W, in my case) PEP headroom wh; /archives//html/Amps/2006-04/msg00247.html (8,856 bytes)
170. Re: [Amps] Chimney materials - Loss or not TSPA (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Fri, 14 Apr 2006 11:18:03 -0700 (PDT); Fascinating webpage, Tony. Thanks!! Joe, N3JI Those pictures are here: 73, Tony W4ZT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/; /archives//html/Amps/2006-04/msg00258.html (8,329 bytes)
171. Re: [Amps] HF RF amplifier negative feedback (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Thu, 27 Apr 2006 11:54:51 -0700 (PDT); Wow!! A four tube 4CX10,000D amp... Can't wait to see it!! I have only subscribed to this reflector for a few months, however I have never seen any discussion on negative feedback in linears to reduc; /archives//html/Amps/2006-04/msg00408.html (8,159 bytes)
172. Re: [Amps] Series PC Power Supplies (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Thu, 1 Jun 2006 11:57:33 -0700 (PDT); Two things... 1. You can get a brand new 25A switching supply for $80-90 if you look around. I bought my Samlex 25A for $80. 2. How did you series the supplies you have? The "first" one will provide; /archives//html/Amps/2006-06/msg00006.html (9,611 bytes)
173. Re: [Amps] Replace 2x 4-400 with 2x 3-500ZG (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Fri, 2 Jun 2006 06:47:59 -0700 (PDT); I don't know... My Henry 3K-A puts almost 4kV @ ~1A on my RF Parts 3-500ZGs, and I beat the tar out of 'em. They'll do 2.4kW output with 150W or so of drive. I run them with about 80W or so drive for; /archives//html/Amps/2006-06/msg00043.html (9,708 bytes)
174. Re: [Amps] IM distortion and such (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Mon, 26 Jun 2006 08:10:35 -0700 (PDT); Normally I stay out of these, but in this case I have to say something... We're not building bridges here where people can lose their lives if a design stretches tolerances a bit. Granted, you could; /archives//html/Amps/2006-06/msg00438.html (13,149 bytes)
175. Re: [Amps] IM distortion and such (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Mon, 26 Jun 2006 08:40:10 -0700 (PDT); Since when does management listen to engineers?? They listen to the mighty $$$$. Just like the Space Shuttle Challenger disaster chain of events, the engineers said "NO!!", but management said "We'll; /archives//html/Amps/2006-06/msg00441.html (13,433 bytes)
176. Re: [Amps] HLA150 (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Wed, 28 Jun 2006 07:51:07 -0700 (PDT); Sounds to me like adding a regulated bias circuit (read: CHEAP) would solve its problems. How much do these things go for (used and/or new), anyway?? Joe, N3JI Ofcourse YOU did not have any problem,; /archives//html/Amps/2006-06/msg00564.html (8,193 bytes)
177. Re: [Amps] HLA150 (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Wed, 28 Jun 2006 10:06:41 -0700 (PDT); I agree -- the question to me is whether or not the cost of the amp + new circuit + time to modify is worth the hassle. If the amp only does 100-150W cleanly, just go buy a 100W rig!! Probably a lot; /archives//html/Amps/2006-06/msg00580.html (7,955 bytes)
178. Re: [Amps] HLA-150? Nevermind. (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Wed, 28 Jun 2006 18:01:59 -0700 (PDT); I have the 30 in/160 out (FM) and it is just below half power in SSB. The manual clearly states to not drive it with more than 10-12W PEP in SSB. It's one of the old brown-face Mirages with the slide; /archives//html/Amps/2006-06/msg00610.html (9,105 bytes)
179. Re: [Amps] HLA-150 information page (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Thu, 29 Jun 2006 07:16:30 -0700 (PDT); Simple, Jim... When there is sufficient low frequency energy (and I mean below 100 Hz), an AM detector can use it to demod the SSB signal! It will sound slightly off frequency because the energy isn'; /archives//html/Amps/2006-06/msg00629.html (10,739 bytes)
180. Re: [Amps] Maximum RF output in practical application: 4-250A (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Mon, 3 Jul 2006 07:27:21 -0700 (PDT); That's the last thing we "need" -- more bogus regulations that can't possibly be enforced without a dedicated staff that 99.99% of the taxpayers I'm sure don't want to pay for. Besides, if they don't; /archives//html/Amps/2006-07/msg00100.html (10,228 bytes)

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