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Home Building a Homebrew Manual Tuner

HomerBB

Supporting Member
Jan 4, 2009
3,861
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Rogers, Ar
I have finally began putting together my manual tuner. I rolled those two inductors about 3 years ago. I got busy, and sidetracked. Now, I've just mounted them on the board. I know, primitive, but what else do I do...
What I will likely need is some of you who've made your own to offer tips along the way.
Maybe this will keep me focused.
20220209_101503-01.jpeg
20220209_101512-01.jpeg
20220209_101524-01.jpeg
 

Crawdad

Down in the mud invasive species
Nov 11, 2016
807
1,685
153
Your usual brilliance Homer. What are your coil winding spacers made from?

73
 

BJ radionut

Supporting Member and 6m addict
May 9, 2008
4,129
4,665
373
35 miles East of Indianapolis

HomerBB

Supporting Member
Jan 4, 2009
3,861
2,414
273
66
Rogers, Ar
Your usual brilliance Homer. What are your coil winding spacers made from?

73
Strips of Spa Hose from Home Depot (sells by the foot) and hot glue.



It's the K1JJ I am thinking to do. Because I only have 100w I figure the copper wire will work for me instead of tubing.

Screenshot_20200405-002108_Home Depot-01-01.jpeg
 
Last edited:

Jay Mojave

Sr. Member
Nov 17, 2015
319
597
103
69
All right HomerBB good going! You don't want the coil or project to look perfect. As many many of my experiences (some successful) show the more imperfect the better they work. Please keep us informed as how it all works out for you.

Balanced Antennas work.

Jay in the Great Mojave Desert
 
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BJ radionut

Supporting Member and 6m addict
May 9, 2008
4,129
4,665
373
35 miles East of Indianapolis
Homer: Find two suitable Wide space Air Variables? Like 200-250 pf +/- range...best if 1000 volt+++ spacing would be better than like old broadcast caps.
img_0373.jpg

Old Johnson 250 series(y)
Pair of these work very well IMHO.
img_0344.jpg

Or like this work well also.
I know ONLY using 100 watts....then you need to build the tuner to handle 400-600 watts.
I know you realize the High voltage that can be generated even at 100w. (Flash-BANG)
That is why you see Sooo many MFJ style 300 watt PEP tuners :mad: for sale at Hamfest's that were burned up by 100 watt transceivers!!!
 

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