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#1
May 6th 04, 05:27 PM
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On Wed, 05 May 2004 20:13:01 -0400, Ken Scharf
wrote: Mosfets in the MRF5xx series (511, 521 for example) have been used up to the 10 meter band with good results. A pair of them can give at least 50w pep output. Depending on the input/output circuitry used and the transistor they require 12-28v power supply. Layout is somewhat critical. THanks, very interesting. I wonder if anyone's tried paralleling up half a dozen of 'em for more power? -- The BBC: licenced at public expense to spread lies. |
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#2
May 6th 04, 05:56 PM
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THanks, very interesting. I wonder if anyone's tried paralleling up
half a dozen of 'em for more power? ================================== Mind in-&output capacitances ,which add-on when parallelling. Frank GM0CSZ / KN6WH |
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#3
May 6th 04, 06:05 PM
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Highland Ham wrote:
THanks, very interesting. I wonder if anyone's tried paralleling up half a dozen of 'em for more power? ================================== Mind in-&output capacitances ,which add-on when parallelling. Frank GM0CSZ / KN6WH Not to mention that "critical layout". -- Tim Wescott Wescott Design Services http://www.wescottdesign.com |
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#4
May 6th 04, 09:34 PM
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On Thu, 6 May 2004 17:56:06 +0100, "Highland Ham"
wrote: THanks, very interesting. I wonder if anyone's tried paralleling up half a dozen of 'em for more power? ================================== Mind in-&output capacitances ,which add-on when parallelling. Indeed, but there must be some current-pumping circuit that might assist here? -- The BBC: licenced at public expense to spread lies. |
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#5
May 21st 04, 06:41 AM
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I've successfully used a complementary-symmetry driver for an MRF510 at
20 and 15 meters, class C, 5 watts out. The driver is essentially digital, being driven to the rails. Roy Lewallen, W7EL Paul Burridge wrote: Indeed, but there must be some current-pumping circuit that might assist here? |
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#6
May 21st 04, 06:41 AM
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I've successfully used a complementary-symmetry driver for an MRF510 at
20 and 15 meters, class C, 5 watts out. The driver is essentially digital, being driven to the rails. Roy Lewallen, W7EL Paul Burridge wrote: Indeed, but there must be some current-pumping circuit that might assist here? |
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#7
May 6th 04, 06:05 PM
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Highland Ham wrote:
THanks, very interesting. I wonder if anyone's tried paralleling up half a dozen of 'em for more power? ================================== Mind in-&output capacitances ,which add-on when parallelling. Frank GM0CSZ / KN6WH Not to mention that "critical layout". -- Tim Wescott Wescott Design Services http://www.wescottdesign.com |
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#8
May 6th 04, 09:34 PM
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On Thu, 6 May 2004 17:56:06 +0100, "Highland Ham"
wrote: THanks, very interesting. I wonder if anyone's tried paralleling up half a dozen of 'em for more power? ================================== Mind in-&output capacitances ,which add-on when parallelling. Indeed, but there must be some current-pumping circuit that might assist here? -- The BBC: licenced at public expense to spread lies. |
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#9
May 6th 04, 05:56 PM
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THanks, very interesting. I wonder if anyone's tried paralleling up
half a dozen of 'em for more power? ================================== Mind in-&output capacitances ,which add-on when parallelling. Frank GM0CSZ / KN6WH |
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