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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Relationship\s+between\s+Q\s+and\s+SWR\s+in\s+PI\s+network\.\s*$/: 7 ]

Total 7 documents matching your query.

1. [Amps] Relationship between Q and SWR in PI network. (score: 1)
Author: Paul Baldock <paul@paulbaldock.com>
Date: Wed, 23 May 2018 15:09:52 -0700
Does anybody know the relationship between Q and SWR for a PI network? For example let's say I design my amp PI output network for 7.0MHz. I simulate the Tube Impedance with a 1K resistor. I put my M
/archives//html/Amps/2018-05/msg00022.html (8,129 bytes)

2. [Amps] Relationship between Q and SWR in PI network. (score: 1)
Author: "Jim Thomson" <jim.thom@telus.net>
Date: Fri, 25 May 2018 10:17:24 -0700
<Does anybody know the relationship between Q and SWR for a PI network? <For example let's say I design my amp PI output network for 7.0MHz. I <simulate the Tube Impedance with a 1K resistor. I put m
/archives//html/Amps/2018-05/msg00024.html (12,197 bytes)

3. Re: [Amps] Relationship between Q and SWR in PI network. (score: 1)
Author: Paul Baldock <paul@paulbaldock.com>
Date: Fri, 25 May 2018 13:48:05 -0700
I found an online calculator http://chemandy.com/calculators/return-loss-and-mismatch-calculator.htm A resistive load of 300 Ohm in a 50 Ohm System represents about a 3dB loss over a 50 Ohm load. A r
/archives//html/Amps/2018-05/msg00025.html (12,231 bytes)

4. Re: [Amps] Relationship between Q and SWR in PI network. (score: 1)
Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>
Date: Sat, 26 May 2018 02:41:44 +0000
Should be 212+j212 I believe to produce impedance of 300 Ohms. Bill I found an online calculator http://chemandy.com/calculators/return-loss-and-mismatch-calculator.htm <https://na01.safelinks.protec
/archives//html/Amps/2018-05/msg00027.html (12,271 bytes)

5. Re: [Amps] Relationship between Q and SWR in PI network. (score: 1)
Author: "sm0aom@telia.com" <sm0aom@telia.com>
Date: Sat, 26 May 2018 19:12:49 +0200 (CEST)
There is a relationship between SWR bandwidth, and Q which is valid for "simple" circuits and for limited excursions from the center frequency. It uses the limit of |X| = R of the input impedance, an
/archives//html/Amps/2018-05/msg00028.html (9,197 bytes)

6. Re: [Amps] Relationship between Q and SWR in PI network. (score: 1)
Author: Paul Baldock <paul@paulbaldock.com>
Date: Sat, 26 May 2018 11:36:25 -0700
Thanks for the info. The calculator I used gave the answer 6:1. but my test circuit gave about 4:1 on my MFJ259 http://chemandy.com/calculators/return-loss-and-mismatch-calculator.htm - Paul Q = cent
/archives//html/Amps/2018-05/msg00029.html (9,287 bytes)

7. Re: [Amps] Relationship between Q and SWR in PI network. (score: 1)
Author: "Jeff DePolo" <jd0@broadsci.com>
Date: Mon, 28 May 2018 11:19:50 -0400
212+j212 is a Zmag of 300, but that doesn't equate to a 6:1 VSWR with a Z0 of 50 ohms; it's 8.6:1 VSWR. I think the previous poster was trying to compare two different complex Z's that both yielded
/archives//html/Amps/2018-05/msg00036.html (9,412 bytes)


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