Hi, I'm a new member.My TL922's 3-500Zs died,I have some 4X500As,it seems the 3-500Z can convertion by 4X500A, Does anyone have this experience?Thanks in advance! 73! Hsu ____________________________
Hi, I have seen some schematic diagram of amplifier, I found that the amount of 811As and 572Bs no more than four, Coud someone can tell me how much maximum amount of the tubes in parallel? Thanks! 7
Thanks Peter! I have got a a died TL922 as a junk,I only pay $100 for it.so I don't want pay for it too much.Althought the 3-500Z are made in China, but I call the factory, They ask me pay $500 for a
Jim, My TL922 was still on its way.if I get it I'll test the 4X500. The FU-500F (4X150) was very easy to get and very very cheap. 73! Hsu As far as I remember you can not run 4X500´s in zero bi
It is right. I have to mod the cooler system. 73! Hsu _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
Richard, I see, too much tube means much drive.Myebe I can not use the cathode drive. I have seen a very old Chinese military 1600W HF transmitter(final is FU-100F=4CX1000A) the pre-driver are 8*6P15
Thanks,Richard. The big problems is the factory no merchandise on hand now. they ask $190/ea for the 3-500Z now! 73! Hsu _______________________________________________ Amps mailing list Amps@contest
I found a very cheap industrial vacuum tube($100 or so) ,Chinese named FU-605, same as (Toshiba?) 6T51, simlat 7072, but mu=48. the vacuum should be better than 833A, and more powerful power(2.5KW@ 5
I found a very cheap industrial vacuum tube($100 or so) ,Chinese named FU-605, it still pruduce now.same as (Toshiba?) 6T51, simlat 7072, but mu=48. the vacuum should be better than 833A, and more po
Hi, I just read the datasheet of 811A and 572B, I find that 811A and 572B only need no more than 10W drive power , drive 10*572Bs or 811As would be need no morthan 100W.Is the loss of in put match wo
Hi, I have the 15th edition. if anyone interested in it, I can send him (PDF format morethan 50M), I'm looking its 23rd edition(pdf format), the Amazone's sold finsh. 73! Hsu ________________________
Rich, I just download 572B datasheet.it appear that the driving power of tube is 4.2W @Class B SSB two tone service, and Ameritron AL572(4*572B), typical drive for CW power out put =75W, maximum SSB
My friend have two tubes, one is 7527, the other one is RS1002A.I have 7527's datasheet, it same as 4-400, but I have not get the RS1002A's, it seems like 4-250 or 4-400. Could someone can tell me wh
I have got the datasheet of RS1002A, thanks! 73! Hsu _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
I just built a "mini" amp, using 8*FU-50(same as Russian GU-50)in push-pull GG, it without HV transformer, I add two HV RF transformers( using HV and high temprature teflon wire winded )at in/out put
I just built a "mini" amp, using 8*FU-50(same as Russian GU-50)in push-pull GG, it without HV transformer, I add two HV RF transformers( using HV and high temprature teflon wire winded )at in/out put
Hi, I need some Russian tubes ??-4?(GS-7B), amount:200-1000 ,depend on the price. 73! Hsu _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting
Hi, GS-7B is 400mW grade very samll power tube.Now Chinese tube factory still product is. but more expensive. A friend of mine , a vacuum tube bussinessman, he want them.Not me. 73! Hsu -- Original M
Hi, Some Chinese tube factory's web site:www.sanle.com.cn,all 3-500 are made by them,they mke 833A too. www.hg777.com, thet producted the best 833A in China and many metail-cermic tube morthan 400kw,