Re: [AMRadio] Solid State 575 mercury vapor Rectifier Replacementsneeded

2009-10-04 Thread sbjohnston
I've made my own solid-state plug-in replacement rectifiers for a variety of tube types. I look up the tube specs and select solid-state diodes that stack up appropriately for current and forward and reverse voltages. I usually end up using either 1N4007s or 1N5408s. From on-lline sources

Re: [AMRadio] Solid State 575 mercury vapor RectifierReplacementsneeded

2009-10-04 Thread Jim Wilhite
Steve, What kind of resistor do you use in this type of rectifier build to simulate the voltage drop? Jim/W5JO - Original Message - I've made my own solid-state plug-in replacement rectifiers for a variety of tube types. I look up the tube specs and select solid-state diodes

Re: [AMRadio] Solid State 575 mercury vapor RectifierReplacementsneeded

2009-10-04 Thread sbjohnston
Jim W5JO wrote: What kind of resistor do you use in this type of rectifier build to simulate the voltage drop? I prefer cylindrical wirewound power resistors for this job (they seem to be able to take more surge current than the sandy rectangular ones in case of a fault downstream). To

Re: [AMRadio] AMRadio Digest, Vol 69, Issue 4

2009-10-04 Thread D. Chester
You can expect somewhat higher voltage from the new stack than the original tube rectifier - if that is a problem for the rig, then add a series power resistor to simulate the internal voltage drop of the earlier tube. So far I've only needed to do that once when the new higher B+ exceeded

[AMRadio] CCA am-1000d

2009-10-04 Thread KA4RFA - Jim Stewart
rescued a continental am-1000d but have no documentation--can anyone help? want to put on 1885 thanks jim ka4rfa __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives:

Re: [AMRadio] CCA am-1000d

2009-10-04 Thread Jim WB5OXQ inb Waco, TX
http://www.contelec.com/ - Original Message - From: KA4RFA - Jim Stewart ka4...@comporium.net To: amradio@mailman.qth.net Sent: Sunday, October 04, 2009 8:46 PM Subject: [AMRadio] CCA am-1000d rescued a continental am-1000d but have no documentation--can anyone help? want to put on

[AMRadio] CCA AM 1000D

2009-10-04 Thread John Lyles
Thats not a Continental Electronics product. CCA was a company that went defunct about 15 years ago. There are some AM1000D's converted to AM, request on the AM forum. John K5PRO rescued a continental am-1000d but have no documentation--can anyone help? want to put on 1885 thanks jim

Re: [AMRadio] CCA AM 1000D

2009-10-04 Thread Dennis Gilliam
CCA was sort of a bastard-son of RCA after they went out of the broadcast equipment biz. Some parts were the same, many not. Try www.ccaelectronics.com or www.goodrichenterprises.com 73 Dennis W7TFO On Sun, Oct 4, 2009 at 7:40 PM, John Lyles j...@losalamos.com wrote: Thats not a Continental