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References: [ +from:i4jmy@iol.it: 231 ]

Total 231 documents matching your query.

141. [AMPS] RF filament choke for indirectly heated cathodes? (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 22 Jun 2000 15:07:40 +0200; If ameritron does right or wrong is another story, but what I can say for sure is that without anode suppressor a 3CX1500 in GG is quite stable and much less prone to VHF parasitic than other common; /archives//html/Amps/2000-06/msg00329.html (11,360 bytes)
142. [AMPS] RF filament choke for indirectly heated cathodes? (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 22 Jun 2000 15:08:25 +0200; If ameritron does right or wrong is another story, but what I can say for sure is that without anode suppressor a 3CX1500 in GG is quite stable and much less prone to VHF parasitic than other common; /archives//html/Amps/2000-06/msg00330.html (11,250 bytes)
143. [AMPS] RF filament choke for indirectly heated cathodes? (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 22 Jun 2000 16:15:28 +0200; Dave, a coil having a proper resistor across doesn't have an high Q but the meanwhile the low Q itself is not enough to prevent parasitics if the suppressor design is somehow incorrect in some aspect; /archives//html/Amps/2000-06/msg00333.html (11,593 bytes)
144. [AMPS] anode tuning (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Wed, 3 May 2000 13:24:08 +0200; The setting of the load cap. and the value of the Pi inductor determine an impedance transformation. This "event" affects the anode resistance but does not determine it in the strict sense. 73, Mauri; /archives//html/Amps/2000-05/msg00037.html (7,282 bytes)
145. [AMPS] RE: Power handling of Coax (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Fri, 5 May 2000 09:33:50 +0200; PTFE isolated coax are not used because of a lower loss. Actually, PTFE coax losses are greater than similar size air, foam or PE dielectric cables as the operating frequency is raised and the ohmic; /archives//html/Amps/2000-05/msg00052.html (8,922 bytes)
146. R: [AMPS] Plate Choke Inductance (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Mon, 17 Apr 2000 18:07:21 +0200; In term of stability for higher bands and a single choke used, the minimal possible inductance on the lowest frequency that doesn't substantially modify the plate impedance (and having the first self; /archives//html/Amps/2000-04/msg00083.html (8,479 bytes)
147. [AMPS] Network analysis of suppressors (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 2 Mar 2000 13:15:12 +0100; My point in an amplifier is to preserve stability and maximize the gain (and efficiency) were I need, minimizing instead the amplification were it's not needed to amplify. 73, Mauri I4JMY -- FAQ on W; /archives//html/Amps/2000-03/msg00031.html (9,742 bytes)
148. [AMPS] 2nd harmonic pumped parasitic (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Fri, 3 Mar 2000 09:05:23 +0100; You're a big pessimist with gain figures and optimist for stability. Just to give an example with a common transmitting tube (once built in a decent way) the 8877 in a GG configuration show, at low; /archives//html/Amps/2000-03/msg00083.html (8,407 bytes)
149. [AMPS] N-Connectors - Thanks for the Replies (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Fri, 3 Mar 2000 10:00:09 +0100; a where I high N connectors aren't so difficult to install correctly and the whole operation is probably quicker than with PL259 when proper method and tools are used. The PL259, weatherproofing and; /archives//html/Amps/2000-03/msg00088.html (9,396 bytes)
150. [AMPS] Design of Plate RF Choke (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Mon, 6 Mar 2000 13:30:42 +0100; amplifier Be satisfied if you have enough reactance, no resonances within operational frequency range, and if this choke is still rated for the current you need. the Under my interpretation, the ass; /archives//html/Amps/2000-03/msg00234.html (10,678 bytes)
151. [AMPS] Better science (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Tue, 7 Mar 2000 13:02:42 +0100; Often (even with some bad performing new tubes) playing the internal electrode alignement, the "bad" or exausted tube, finds a new life. Worse than with semiconductors, RF power tubes suffer because; /archives//html/Amps/2000-03/msg00351.html (8,014 bytes)
152. [AMPS] exciter to amp coax length (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Fri, 10 Mar 2000 16:12:44 +0100; There is no special reason to have a certain lenght of cable between transmitter and amplifier if the input of the amplifier has been perfectly matched to the nominal impedance and coupled for the ma; /archives//html/Amps/2000-03/msg00544.html (8,368 bytes)
153. R: [AMPS] Chokes (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Sun, 12 Mar 2000 14:15:29 +0100; Line impedance is not enough to establish if 100 uh (XL=1130.9 Ohm) is a suitable value. It depends by the wire size and geometry of the winding. 73, Mauri I4JMY -- FAQ on WWW: http://www.contesting.; /archives//html/Amps/2000-03/msg00596.html (8,194 bytes)
154. R: [AMPS] Chokes (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Sun, 12 Mar 2000 22:51:36 +0100; My vote to support Mr. Measure point and a blame to such manufacturers (they know why). 73, Mauri I4JMY -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administ; /archives//html/Amps/2000-03/msg00609.html (8,673 bytes)
155. SV: SV: [AMPS]Plate choke at the antenna end instead? (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Mon, 13 Mar 2000 10:55:17 +0100; An old short wave amplifier by R&S had the choke in the middle of a modified PL network. 73, Mauri I4JMY <w6ru@lightspeed.net>, Phil Clements <philk5pc@tyler.net>, Amps@contesting.com antenna resonan; /archives//html/Amps/2000-03/msg00615.html (9,050 bytes)
156. [AMPS] Receiver performance (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Mon, 13 Mar 2000 15:46:03 +0100; Some of that numbers effectively doesn't fit, expecially for the tests performed with SSB filters @ 3k spacing. A spacing that's practically useless in a real SSB traffic because of the inherent SSB; /archives//html/Amps/2000-03/msg00622.html (10,148 bytes)
157. [AMPS] tetrode output (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Tue, 14 Mar 2000 12:33:55 +0100; Giving half the RF voltage to the grid (-6 dB) and then regulating the driving power from the rig to obtain 400W. 73 Mauri I4JMY <boatanchors@listserv.tempe.gov> watts, on the from -- FAQ on WWW: htt; /archives//html/Amps/2000-03/msg00657.html (7,678 bytes)
158. [AMPS] Re: New G2DAF amplifier information (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 16 Mar 2000 12:02:25 +0100; Most of that style amplifiers are actually using the very peculiar Philips QBL 3.5/5000 that leads to say much bigger amplifier, two times or more, than the standard amateur market Alpha's or Ameritr; /archives//html/Amps/2000-03/msg00731.html (10,520 bytes)
159. Fwd: Re: [AMPS] Re: New G2DAF amplifier information (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 16 Mar 2000 12:38:08 +0100; Lapsus....... The tube is the QBL5/3500 (6076) and not QBL3.5/5000 (that doesn't exist). 73, Mauri I4JMY -- Initial message -- To : Jan.E.Holm@telia.se Cc : amps@contesting.com Date : Thu, 16 Mar 200; /archives//html/Amps/2000-03/msg00734.html (10,263 bytes)
160. [AMPS] Re: Re: New G2DAF amplifier information (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 16 Mar 2000 13:13:35 +0100; The power, Jan, the power (plate dissipation, plate current,etc.) not the size...... Also my car has 4 weels and can be similar in size to a racing one but it is not the same fast and the engine runs; /archives//html/Amps/2000-03/msg00736.html (9,161 bytes)

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