I think the two tuned circuits are coupled by L2, which provides bottom end coupling. The double peaking is caused by too much coupling between the two tuned circuits. To reduce coupling, you need less inductance for L2. Also be sure you have a 50 Ohm load on the RX when initially setting up the front end. 73 Dave G3PVH
You take great pride in your construction and boy does it show! An excellent video on an exellently built piece of equipment. It's got to be Tens all round from me.
Hi ! I am a Ham ! This is a wonderful project ! Really nice job ! I am considering a similar project, perhaps the Simplex Four or similar reflex type receiver. This is inspiring. I have built novice type transmitters and it would be nice to have a novice receiver. Please never remove this video as I would like to see it in the future, thanks !
Very nice and precision build. The reason you B+ is higher is we run 125VAC instead of 110VAC back when this was designed. The extra capacitance will increase it a little mostly by stiffening the multiplier. Hope you’re still at it. 73… 😊
wonder why the regen control is on the inside of the chassis, instead of on the front panel......just curious of why it's built that way.....seen his other videos, and all are quite good....I need to start building again.....been at least 35 years......
Beautiful construction that would have made the designer/builder (Byron Goodman, W1DX) applaud. The double input peaking you're experiencing may be the result of mounting your front-end-filter coils considerably closer together physically than in the photographs of the original. This could result in overcoupling, which gives a double-peaked response. Using equivalent identical toroidal coils, which have relatively little external field compared to solenoidal coils, is one possible fix. Another approach would be to experiment with reducing the number of turns in the coupling inductor to offset whatever unwanted coupling is occurring by other means. (That you used a nonconducting coil form rather than a 100-k resistor makes no practical difference for an inductor of such a low value. An equivalent small toroidal coil could be used in this position as well.)
Dear OM The coil L2 is a bit too high in inductance, which means than L1 and L2 are overcoupled. This gives the two peaks. Try taking off turns gradually a couple at a time. The resistor value is, as you say, irrelevant. You can also use a capacitor in this position. The coupling will never be correct on both 40 and 80m. It is beeter to use an RF stage to seperate the two tuned circuits to avoid this problem. I like yor RX very much. 73
I think the two tuned circuits are coupled by L2, which provides bottom end coupling. The double peaking is caused by too much coupling between the two tuned circuits. To reduce coupling, you need less inductance for L2. Also be sure you have a 50 Ohm load on the RX when initially setting up the front end. 73 Dave G3PVH
You take great pride in your construction and boy does it show! An excellent video on an exellently built piece of equipment. It's got to be Tens all round from me.
Well done video and great narration. This one of the better Homebrew projects I have seen recently. Thanks for sharing your work.
73,
Glenn WA4AOS
Hi ! I am a Ham ! This is a wonderful project ! Really nice job ! I am considering a similar project, perhaps the Simplex Four or similar reflex type receiver. This is inspiring. I have built novice type transmitters and it would be nice to have a novice receiver. Please never remove this video as I would like to see it in the future, thanks !
Very nice and precision build.
The reason you B+ is higher is we run 125VAC instead of 110VAC back when this was designed.
The extra capacitance will increase it a little mostly by stiffening the multiplier.
Hope you’re still at it. 73… 😊
A very nice build..and I like the 1961-style instrumental at the start.
These radios were the best
Very good construction ! Interesting design for 2 band operation.
wonder why the regen control is on the inside of the chassis, instead of on the front panel......just curious of why it's built that way.....seen his other videos, and all are quite good....I need to start building again.....been at least 35 years......
Beautiful build!
SOLIDSTATE RX HOMEBREW !!! CONGRATS! BEST VIDEO! VY 73!!
Very nice work!
Nicely constructed reciever. Good video!
Do you have a video on how you made this thing
Fantastic !!!!
Tha's is what i really love in ham radio !!!
I wish i had time to do more homebrew.
That is beautiful work. I have built a lot of equipment but I have never attempted a receiver. 73 WA4QGA
Is it a autodyne design?
Beautiful construction that would have made the designer/builder (Byron Goodman, W1DX) applaud. The double input peaking you're experiencing may be the result of mounting your front-end-filter coils considerably closer together physically than in the photographs of the original. This could result in overcoupling, which gives a double-peaked response. Using equivalent identical toroidal coils, which have relatively little external field compared to solenoidal coils, is one possible fix. Another approach would be to experiment with reducing the number of turns in the coupling inductor to offset whatever unwanted coupling is occurring by other means. (That you used a nonconducting coil form rather than a 100-k resistor makes no practical difference for an inductor of such a low value. An equivalent small toroidal coil could be used in this position as well.)
Fantastic work!
Very nice sound !!!
Tell me the model of speaker. Thank.
Very nice! Nice sounds.
Dear OM
The coil L2 is a bit too high in inductance, which means than L1 and L2 are overcoupled. This gives the two peaks. Try taking off turns gradually a couple at a time. The resistor value is, as you say, irrelevant. You can also use a capacitor in this position. The coupling will never be correct on both 40 and 80m. It is beeter to use an RF stage to seperate the two tuned circuits to avoid this problem. I like yor RX very much.
73
Nice construction! Randy
I really want to know if this radio is EMP proof. It'd be awesome if it was.
Excellent build.
is possible schematic diagram?
got an on line copy of the schematic?
Congratulations, very nice job, thanks for share
Very Nicely done!
Awesome project - it looks so clean that it could be in the pages of QST , is this a superhet front end with a regen detector?
Work of art.
Whoa! that's semi-rigid coax running through there - expensive stuff!
Nice construction job!
KX7L
Very very nice, how long did you take to build this Radio?
I didn't know that "Hawkeye Pierce" from M.A.S.H is a radio ham :)
What a great receiver
WOW very good job. nice rig!
very wonderful!!!!!!!
Beautiful.
great work!!! good luck!
Nice video, hope we meet on air soon, Subscribed
I admire anyone who can homebrew. I have the construction skills of a potato.
Man, thats a work of art.
Отличный монтаж,не то что у иных
,,воронье гнездо,, и отличный
результата,73!
Superb!
Very nice!!
belle qualité audio
Sure looks great...nice work and sounds great. 73 W4GSM
Nice receiver
Respekt!!
great sound radio!!! 73 JA8JPO
goooooodd!! :-)
very nice Regen ist cool ":))
:( i wish i had the cash for ham radio maybe my great uncle will pass down his to me :/ till then no fun for me
gr9 job
de n8zu
Ничё1