813 verses four 807 valves for mitters

Рет қаралды 9,207

vk3ase

2 жыл бұрын

Should you use an 813 or four 807's for a 100 watt transmitter.

Пікірлер: 32

@jeromewhelan6723 Жыл бұрын

I so enjoyed this. Seeing the re-used chassis and panel, the chain-drilled large holes, the point-to-point wiring, and hand-wound coils brings back fond memories of my first 807-based transmitter in 1963.

@SpinStar1956 7 ай бұрын

Appreciate all your hard work. 73… 😊

@Radio478 2 ай бұрын

Great thanks 👍 from England

@EvLoutonian 2 жыл бұрын

Bloody fantastic - and inspiring stuff. Really enjoyed seeing the work you've done, and getting to see it all up close with the detailed explanation. Fascinating!

@donwright3427 6 ай бұрын

807s are very nice for guitar amplifiers. They have a good tone and even harmonics

@luckydubeinrc5165 2 жыл бұрын

love guys like this...we build it, you can buy it over a counter for a few thousand, well done and good explanations, i enjoyed looking into your valve world.

@m0dad 2 жыл бұрын

Excellent stuff and very inspirational video. This is real radio. I wish my vintage junkbox components was half as extensive. I find those 2.5mh chokes very hard to come by but have a few in reserve. Will have to have a rummage soon and get building. Many thanks for sharing the video. 73 from North East England. M0DAD David.

@chris_vk3cae 2 жыл бұрын

Another excellent production 👍

@gordonwelcher9598 Жыл бұрын

The 814 is something like 1/2 of an 813. 1500 volts, 150 ma, 60 watts dissipation. Years ago I remember buying them for about $2. Not very common nowadays. They worked well if you don't mind 1500 volts.

@sciencefollower Жыл бұрын

VERY MUCH APPRECIATED. I REMEMBER I USED THREE 813 IN MY HOME MADE TRANSMITTER. THE PLATES WENT RED HOT DURING SSB TRANSMISSION AND I USED TO PASS MIKE. I DID NOT ARRANGE FORCE AIR COLLINS. REGARDS, AP2KD.

@msf60khz Жыл бұрын

I use the miniature 807 called 5B/254M. It is electrically identical and I get 75mA cathode current at 600V and 30 W output in AB1. 73

@Albert-zl3zd 2 жыл бұрын

Nice old stuf. Albert the netherlands Also Nice weather There 📻🇳🇱

@Vortex5Australia 2 жыл бұрын

amazing, bloody amazing... Let's hope you hit those tropic bands soon...

@kristhompson8112 Жыл бұрын

Just dropped in on your channel , Sounding very much like a ZL accent brother if I'm not correct, If it glows in the dark the better, if it glows x4 in the dark, now your talking. Wish I knew more about this old boat anchor High voltage kit. Just love it Regards and 73's Auckland NZ

@whatillo Жыл бұрын

Hey very nice...I built a linear amplifier whit two 813 in grounded grid configuration and that thing make a lot of audio big audio coming out from those bottles. 73"...W

@eddyaudio 2 жыл бұрын

A Wonderful Transmitter Dave

@eddyaudio 2 жыл бұрын

And you are wonderful at Recycling as they Junk keep this excellent effort Dave Ian Vk2IJ.

@dhisnadhamayanthi1135 8 ай бұрын

I have seen grampian audio amplifier s with 807 out put tubes

@assumedspider8419 12 күн бұрын

watched this a few times do you have any schematics? cheers!

@lc79tourer26 2 жыл бұрын

Good work Dave inspiring stuff and I'm still missing your missions if the counts for anything?

@vk3ase 2 жыл бұрын

Never new any one listened.

@user-bo8eq7ki5w Жыл бұрын

В СССР выпускался с строковых годов "клон" 813 -й лампы под названием ГУ-13 ( как и (г-807- 807)

@towerman75 6 ай бұрын

I'm sure you are a good technician, but your construction practices would make one have nightmares.

@kennethmcclure29 7 ай бұрын

Thank you very much. Reminds me of years past when everyone built their own equipment. Ken from gpt ms

@Paul_VK3HN 2 жыл бұрын

A lifetime of building, using and thinking about valve AM transmitters let's you do this... a 200 watt tube AM Tx made out of stuff most hams would bin! Great work Dave, the global semiconductor shortage hasn't bothered you.