1) the PS should be soft start 2) Give more attention on insulation between primary .and secondary of SMPS transisformer, at least 10000V, if use in 4CX10000A. 3) Give more attention on receiver 's n
I just acquire a used Racal TT1885 1kW auto tune transmitter ( 4CX1500B final) , anyone have the manual? Thanks in advance! 73!Hsu _______________________________________________ Amps mailing list Am
I do not think a DC regulator for direct heater tube is a good idea,I draw a block diagram for AC filament regulator here:http://www.zmdz.com/bbs/incomefiles/20117/1089098780.JPG, just a block diagra
Hi John, You are correct. But a problem ,AD's true RMS chip is not a inexpensive device. I have an idea, using a inexpensive CdS photoresistor-LED or micro-bulb photocoupler( like N110 in ICOM PS-35
We just finshed our next project FU-728F 2500WPEP auto tune amplifier. We can supply it in end of this month and supply exiting manual amplifier update to auto tune service.Now, most of orders came f
I can supply almost ALL bipolar transmitting transistors in past thirty years include discontuned model. Yes, ALL!brand new,just product from the factory!No FET. The order should not be too small qua
I have receive many enquiry, I 'll answer these here: The transistor are Made in China, these transistor mainly suupply to the Force in China.These transistors used in Chinese vehicle,manpack and air
Examcuse me.A guy email to me that he want purchase some tubes, But I missed his e-mail. If he still want it, please contact with me off line. 73!Hsu _______________________________________________ A
Chinese 811A is a very short life tube. I had repair some AL811 what using Chinese 811A. The tubes only use few hours,but needs replace. I have ask some doctors what operate the medical machine( usin
Hi, I'm building some cathode driven amplifiers in Class AB1, anyone knows how many input impaedance of 4CX1000A and 4Cx250B? Another question: I noticed many amplifiers using adjuestable( variable i
This is our new 2000W auto tune amplifer : http://www.zmdz.com/bbs/incomefiles/201111/10933482293.JPG http://www.zmdz.com/bbs/incomefiles/201111/109354365436.JPG http://www.zmdz.com/bbs/incomefiles/2
Hi., Im thinking to build a mobil amplifier to replace my SG500 in my Golf. It will cover 160-6m, there are some projects:a) 2X4XRD100HHF1 parallel and Push-pull, b)2XRD100HHF1 pushpull as a PA model
Hi, Yesterday evening, I check all cables and clean the connector, change the coax cables place and cut redundant coax cable, I add a EMC filter ,now, All OK! Tks alll who respon my topic!Thanks type
Must be have reapir/service ability.We build 2000W manual/auto Tune amplifier. Abt more detail, please contact with me off line. Regards Hsu _______________________________________________ Amps maili
Hi, Does anyone has test HL-1K? I want to know its 3rd IMD order.Does ARRL Lab have test it?The manual not show it. Thanks inadvance! 73!Hsu _______________________________________________ Amps maili
Just find some door knobs from the basement , 14.5kV/1000P, for 4CX5000/10000 plate block capacitor .$30/ea, and I have a pair 4CX5000/10000 socket(few finger are missed), $200/ea. 73!Hsu ___________