2016年6月29日 · I chose 6GF7 ( novar equivalent) because it's now cheaper than 6EM7. Interstage transformer (from private winder) on the diagram has been designed for low rp …

2016年6月29日 · 6EM7 cathode bias voltage is the limiting value. If you want more power (over A1 region), the first stage peek voltage would exceed, so you push 6EM7 to A2 region …

2024年11月26日 · 一起来做小胆机：mini.1【迷你卍】6GF7单端 近十多年来，一直在搜集复合三级功率管。 去年底重出江湖，做的第一台机器就是6GF7A单端，老帖子见： …

Vintage Tube Amplifier P-50-A (7027a, 5R4GYB, 6GF7, OA2, 6CB6A). Part of a large estate lot of a former G. Looks to be either an extremely rare or homebrew tube amplifier. 7027a, 5R4GYB, …

2017年6月4日 · Years ago, the power transformer was custom made for me by A.E. in Holland. For stereo, it is a big one! The seperate heater supply is for the 6GF7 only, that is the …

Post subject: 6GF7 Amp. Posted: Aug Mon 04, 2008 3:03 am . Member: Joined: Jan Thu 01, 1970 12:00 am Posts: 626 I've been doing my testing with a 13GF7A The schematic is what …

Find many great new & used options and get the best deals for Vintage Sylvania 6GF7 Vacuum Tube With Original Box NOS Radio Amp Tested USA at the best online prices at eBay! Free …

2021年4月10日 · 6P15 电压不用降低， 但是电流要降低 恒流电阻最好加大1-2欧， 降低点电流。 朋友玩台6P14推挽，10多年前老供电线路电压较低210V左右， 最近10年供电改造后电压220 …

2024年6月15日 · Find many great new & used options and get the best deals for Lot 4 GE RCA 6GF7A/ 6GF7 Vacuum Electron Tube Amp Radio Ham Tested Good+++ at the best online …

Find many great new & used options and get the best deals for Matched PAIR 6GF7 RCA USA Fat Bottle Black Plate NOS Tubes Dual Triode Spud Amp at the best online prices at eBay! …