Nice show. TO put his HT's on display in background. I have made a fer 4:1 UNUN's. The FT 240-43 with #14 mag wire at 10 wraps and works super . easy 400 watt FT8 on 10/12 meters and no ATU ! I do a fold back and twist at end on 25 FT and tunes under 1.5 SWR .Once I got 1.1 SWR on 28.074 MHZ. Normally it like 1.3 or 1.4 SWR . Adjust a tad and swap bands 10/11/12 . works out about 5/8 wave with 4:1 UNUN . same 4/8/16 radials . I did tune 80 meters with 25FT vertical with Icom 7300 in E-TUNE mode 50 watts . Just did not make many FT8 contacts with 25FT . Need like 51FT to work good. I did do a 43 FT vertical with 4:1 UNUN and tuned 1.7 at 20 meters FT8 and worked like gangbusters. About 5/8 wave at 20 meters. It is not the 5/8 over 1/2 wave thing that you would think. The 4:1 UNUN has lower loss than a 49:1 UNUN. Leads to more antenna gain. And 4:1 UNUN runs cooler under power to a 49:1 UNUN. I think that plumpe green core can do 500 watts with #14 mag wire . The FT 240-43 does and runs cool . Wind the same as 49:1 and gets hot somewhat quick. . The type 61 does work better on 10 and 6 meters . I tested that . The 43 ferrite works better 40/80 meters. The RED type 2 .T200-2 core workers fine 4:1 on 10 turn wrap . I did 8 turn as well. I tune better on 10 turn . 100 watt FT8 hours on T200-2 red core only got warm. Like 95F .That about all i did on 4:1 UNUN testing. Only had #14 mag wire and a few cores. If you up a size on mag wire to #14 with that green core would be a great QRO test. 73
Hol' up...Chuck just dropped "my buddy Les with this band did a song about a beaver" and the chat let that go??? Seriously??? LOL. Were you pulling our leg Chuck?
Nice show. TO put his HT's on display in background. I have made a fer 4:1 UNUN's. The FT 240-43 with #14 mag wire at 10 wraps and works super . easy 400 watt FT8 on 10/12 meters and no ATU ! I do a fold back and twist at end on 25 FT and tunes under 1.5 SWR .Once I got 1.1 SWR on 28.074 MHZ. Normally it like 1.3 or 1.4 SWR . Adjust a tad and swap bands 10/11/12 . works out about 5/8 wave with 4:1 UNUN . same 4/8/16 radials . I did tune 80 meters with 25FT vertical with Icom 7300 in E-TUNE mode 50 watts . Just did not make many FT8 contacts with 25FT . Need like 51FT to work good. I did do a 43 FT vertical with 4:1 UNUN and tuned 1.7 at 20 meters FT8 and worked like gangbusters. About 5/8 wave at 20 meters. It is not the 5/8 over 1/2 wave thing that you would think. The 4:1 UNUN has lower loss than a 49:1 UNUN. Leads to more antenna gain. And 4:1 UNUN runs cooler under power to a 49:1 UNUN. I think that plumpe green core can do 500 watts with #14 mag wire . The FT 240-43 does and runs cool . Wind the same as 49:1 and gets hot somewhat quick. . The type 61 does work better on 10 and 6 meters . I tested that . The 43 ferrite works better 40/80 meters. The RED type 2 .T200-2 core workers fine 4:1 on 10 turn wrap . I did 8 turn as well. I tune better on 10 turn . 100 watt FT8 hours on T200-2 red core only got warm. Like 95F .That about all i did on 4:1 UNUN testing. Only had #14 mag wire and a few cores. If you up a size on mag wire to #14 with that green core would be a great QRO test. 73
You’re buddies with Les claypool. That’s awesome chuck
Chuck is worldwide
Hol' up...Chuck just dropped "my buddy Les with this band did a song about a beaver" and the chat let that go??? Seriously??? LOL. Were you pulling our leg Chuck?
Nope, Chuck and Les are boys 😮