Reverse neutralization: brilliant. Though it’s beginning to sound like an automotive shop with all the discussion of transmission, reverse, drive, neutral(ization)! This is timely for me, since I have a T-4XB coming up soon for reconditioning. Appreciate all of your insight!
Mike, I've never seen it like that. I will do this in the future to neutralize. You really taught me something very useful. Many thanks. It's a lot of fun watching you restore and adjust these old Radios. mny 73s
@@MIKROWAVE1 I hope not, a shock from it could be lethal. I don't know what it is about some old equipment, it just sounds better and smoother and is a bit of a challenge. There is also something about the small of hot valves/tubes that is satisfying. :-))
Second post Mike.. cuz I can't sleep. I'm a new retiree you see! Anyways- I once measured the power input to my SB-101 whilst laying down my mighty carrier. I'm a lowly QRPer you see... and as I did the math I was sitting in my 2nd story apartment in Seattle, sweating me bum off with no AC. I was just careful not to drip sweat on the PA choke or, even better, not into the PA cage at all. I had to smile and still do every time I use it in an on-air activity! Mostly those that happen in winter you see. I'm back home in Michigan (thank God) and it's much, much hotter here :)
Nice...but I don't have a lot of the equipment used to do those steps. I think the only thing I need to check is the carrier balance. The rig has worked nicely for many years (bought mine in 1973), but I think I should at least check the balance. My generators are a Hickock 288x and the Heathkit one from the 1960s. No scope probes, none of that.
I have no ham experience, but I have noted that SSB voice transmissions as received on ham rigs usually seem rather distorted. Part of this could be from a narrow bandpass, but I think I hear significantly more distortion than I would expect simply from narrow bandpass. What causes this distortion, or am I misinterpreting what I hear?
Bed time. Finally. But first, I'm curious if aligning the BFO/Carrier osc corrected the disparity in audio tone when switching between usb and lsb. And if not, is it because the two filters drifted in a similar direction? With my Sb-101 I had to pad one het osc crystal and series the other with a cap to get a similar sounding note when switching between the two modes. I got it close but not right on. Thanks for the BRILLIANT content Mike! 72 OM
Great question. I will show this in the third video. The short answer is absolutely. The carrier oscillator had to be adjusted to match the aged crystal response and while good, you never quite get what they ask for, which is identical white noise.
Hey am new to your channel and like what I see ,while repairing or restoration could you please link to schematics so we can follow or if you can share in your description, keep up the great videos. Regards
Youngin's don't stress: let me interpret Mike's claim of this piece of JuJu for the Soul consumes "50 watts.. 50 watts just to light the radio up". Just wait till he makes the plates glow red! Ooops. Sorry! I think he means this: that the energy is simply energy stolen from that awful gas furnace in Michigan winter, so it's a good thing! And also- this beautiful machine injects.. oops, sorry- it adds Soul Healing Energy JuJu to the air of the home! I'd like to add that you may then take down all those silly 'fengshui' (sp? I'm old) crystals in the windows. Plus- wait till you smell this wonder when the plates are a glowin'... it will blow your mind
In the Power supply vid, I recap that. In Part 1, I recap the 4 electrolytics leaving the shiny one disconnected as show. I also show how to test the paper caps leakage in place my Cap meter. So all caps good before we turned a slug.
@@MIKROWAVE1 , I KNOW you are a bug on things... that is why I was amazed you hadn't recapped the old dog (i owned one back when). See Paul Carlson's series and find a fellow who knows about the same as you but is even MORE "OC" about restoration. LOL Forgive my rhetoric! I'm an old fart who loves a "total restoration."
I feel like I just spent the last 35 minutes in 1965. Tubes will do that to me everytime. Great video!
Thank you for taking the time to make these videos; they have helped me to bring my TR-4 back to life and perfectly align it...
I really appreciate the time you spend showing this. It is great to see old radios I dreamed of having as a kid come to life again.
Great info Mike, as usual, be looking for part 3 ! Congrats !
Reverse neutralization: brilliant. Though it’s beginning to sound like an automotive shop with all the discussion of transmission, reverse, drive, neutral(ization)!
This is timely for me, since I have a T-4XB coming up soon for reconditioning. Appreciate all of your insight!
Mike, I've never seen it like that. I will do this in the future to neutralize.
You really taught me something very useful. Many thanks.
It's a lot of fun watching you restore and adjust these old Radios.
mny 73s
The reverse neutralization is new to me. This is an excellent video! Thank you.
Thank you very much Nice video Enjoying this video thank you from Japan near Tokyo
Sounds and looks good. Brilliant.
It was a fun experience and best of all - I did not get shocked.
@@MIKROWAVE1 I hope not, a shock from it could be lethal. I don't know what it is about some old equipment, it just sounds better and smoother and is a bit of a challenge. There is also something about the small of hot valves/tubes that is satisfying. :-))
Second post Mike.. cuz I can't sleep. I'm a new retiree you see! Anyways- I once measured the power input to my SB-101 whilst laying down my mighty carrier. I'm a lowly QRPer you see... and as I did the math I was sitting in my 2nd story apartment in Seattle, sweating me bum off with no AC. I was just careful not to drip sweat on the PA choke or, even better, not into the PA cage at all. I had to smile and still do every time I use it in an on-air activity! Mostly those that happen in winter you see. I'm back home in Michigan (thank God) and it's much, much hotter here :)
Nice...but I don't have a lot of the equipment used to do those steps. I think the only thing I need to check is the carrier balance. The rig has worked nicely for many years (bought mine in 1973), but I think I should at least check the balance. My generators are a Hickock 288x and the Heathkit one from the 1960s. No scope probes, none of that.
I have no ham experience, but I have noted that SSB voice transmissions as received on ham rigs usually seem rather distorted. Part of this could be from a narrow bandpass, but I think I hear significantly more distortion than I would expect simply from narrow bandpass. What causes this distortion, or am I misinterpreting what I hear?
Bed time. Finally. But first, I'm curious if aligning the BFO/Carrier osc corrected the disparity in audio tone when switching between usb and lsb. And if not, is it because the two filters drifted in a similar direction? With my Sb-101 I had to pad one het osc crystal and series the other with a cap to get a similar sounding note when switching between the two modes. I got it close but not right on. Thanks for the BRILLIANT content Mike! 72 OM
Great question. I will show this in the third video. The short answer is absolutely. The carrier oscillator had to be adjusted to match the aged crystal response and while good, you never quite get what they ask for, which is identical white noise.
waiting for the next part...
Hey am new to your channel and like what I see ,while repairing or restoration could you please link to schematics so we can follow or if you can share in your description, keep up the great videos. Regards
Wayne I have a facebook channel called Mikrowave1's Radio Resource Page. That is where I put schematics that are requested by viewers.
Thanks for showing off the different methods for neutralization. I wasn't are of them all. b.
73 milan. Najbolji prijemnik ikad napravljen.
Milan. Mnogi vjeruju da je Drake R4 najbolji. 73 Mike
Youngin's don't stress: let me interpret Mike's claim of this piece of JuJu for the Soul consumes "50 watts.. 50 watts just to light the radio up". Just wait till he makes the plates glow red! Ooops. Sorry! I think he means this: that the energy is simply energy stolen from that awful gas furnace in Michigan winter, so it's a good thing! And also- this beautiful machine injects.. oops, sorry- it adds Soul Healing Energy JuJu to the air of the home! I'd like to add that you may then take down all those silly 'fengshui' (sp? I'm old) crystals in the windows. Plus- wait till you smell this wonder when the plates are a glowin'... it will blow your mind
This really should be a "restoration" project. All those old caps are dead, dead, dead. de KQ2E
In the Power supply vid, I recap that. In Part 1, I recap the 4 electrolytics leaving the shiny one disconnected as show. I also show how to test the paper caps leakage in place my Cap meter. So all caps good before we turned a slug.
@@MIKROWAVE1 , I KNOW you are a bug on things... that is why I was amazed you hadn't recapped the old dog (i owned one back when). See Paul Carlson's series and find a fellow who knows about the same as you but is even MORE "OC" about restoration. LOL Forgive my rhetoric! I'm an old fart who loves a "total restoration."