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1. [Amps] YASSA AMP (score: 1)
Author: zdtech <zdtech@iprimus.com.au>
Date: Fri, 26 May 2006 07:46:13 +0100
Yet Another Solid State Amplifier. QST June 2006. 50 volts fets, 600 watts output. Simplistic construction methods. Makes a single 4cx800 amp project look like a lot of work! No IMD measurements, but
/archives//html/Amps/2006-05/msg00371.html (6,303 bytes)

2. [Amps] ALC Overshoot (score: 1)
Author: zdtech <zdtech@iprimus.com.au>
Date: Sat, 10 Jun 2006 10:25:59 +1000
SM5BSZ has been writing and testing on this issue for a long time. http://www.sm5bsz.com/dynrange/alc.htm His various measurement on different HF transceivers makes for some interesting reading. Just
/archives//html/Amps/2006-06/msg00246.html (7,366 bytes)

3. [Amps] New Dummy Load (score: 1)
Author: zdtech <zdtech@iprimus.com.au>
Date: Fri, 16 Jun 2006 21:28:46 +1000
Just noticed this on Alpha's web page for those interested. http://www.alpharadioproducts.com/2100.asp Craig VK3HE _______________________________________________ Amps mailing list Amps@contesting.co
/archives//html/Amps/2006-06/msg00302.html (6,117 bytes)

4. Re: [Amps] 4CX10 000J (score: 1)
Author: zdtech <zdtech@iprimus.com.au>
Date: Mon, 03 Jul 2006 14:30:43 +1000
Whats interesting is that if you look at the Eimac published data on the 4CX10000D running at 1350 volts on the screen, the 3rd order IMD figure is close or equal to the 4CX10000J's. This data comes
/archives//html/Amps/2006-07/msg00067.html (9,284 bytes)

5. Re: [Amps] Maximum RF output in practical application: 4-250A (score: 1)
Author: zdtech <zdtech@iprimus.com.au>
Date: Mon, 03 Jul 2006 20:26:58 +1000
I think based on the work by SM5BSZ i think a good standard to aim for in ham transmitters would be the FCC's Part 80 maritime IMD mask standard. It requires 3rd order products to be down 30 db as re
/archives//html/Amps/2006-07/msg00081.html (16,248 bytes)

6. [Amps] QEX Innovative Tube Linear? (score: 1)
Author: zdtech <zdtech@iprimus.com.au>
Date: Fri, 07 Jul 2006 23:22:08 +1000
Anyone receive their July/August copy QEX? There is an article in there called "A Innovative Tube Linear" I am just wondering what is so innovative about the linear? My issue of QEX arrives quite lat
/archives//html/Amps/2006-07/msg00250.html (6,945 bytes)

7. Re: [Amps] QEX Innovative Tube Linear? (score: 1)
Author: zdtech <zdtech@iprimus.com.au>
Date: Fri, 07 Jul 2006 23:50:36 +1000
Hi Dick Most interesting, i just wonder how they went about improving the terrible IMD from Sweep tubes? It would be great if the same technique could be used with some better quality transmitting tu
/archives//html/Amps/2006-07/msg00251.html (8,045 bytes)

8. [Amps] PIN diode mods (score: 1)
Author: Craig <zdtech@iprimus.com.au>
Date: Wed, 26 Jul 2006 10:30:35 +0000
The PIN diode mods were mostly for 2nd order IMD problems. There were claims for some minor improvements in blocking and 3rd order dynamic range. However i seem recall most of the mods applied to low
/archives//html/Amps/2006-07/msg01149.html (7,655 bytes)

9. [Amps] W3NQN High power RF Harmonic filters (score: 1)
Author: Craig <zdtech@iprimus.com.au>
Date: Thu, 27 Jul 2006 06:34:41 +0000
You can find all the details on the ARRL web page, its a freebie download. These are the original W3NQN articles. If you dont need bandpass filter characteristics and you do want greater suppression
/archives//html/Amps/2006-07/msg01211.html (7,494 bytes)

10. [Amps] EB104 600 watt amp (score: 1)
Author: "zd" <zdtech@iprimus.com.au>
Date: Tue, 5 Sep 2006 21:17:29 -0000
Heres a Link With Pictures http://www.qsl.net/wm5z/HF%20Amplifier.htm The MRF 150's have superb 3rd and 5th order IMD figures, especially when you use something like 100 watts output per device. A go
/archives//html/Amps/2006-09/msg00107.html (6,885 bytes)

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