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Aloha Manuel, I just pulled the trigger and bought one.

I love man I man and any time

Hello! Thanks for the video, I have such a DC-DC converter at home, it can handle 800 volts, but you don't need it!

Thank you, I've actually learned something useful today. You made it seem very simple.

Hi, can I leave out the 100k resistor under the potentiometer? Doesn't fet cause problems? It would be nice if I could set the voltage from zero, I have an irfp460 which is good up to 500 volts. Thanks!

I wonder why SONY didn't use the AN612 as the first mixer and also in the FM front end and you could just use crystal filters and lose a lot of the IF transformers and possibly simplify the main circuit board.

i have one radio

I have one

Zenith Radio royal 7000-1 I need to get it repaired

Zenith Radio royal 7000-1 Repair??

Just happened to me today. So I guess I fried it. Too bad becuase radio was a thrift store find for $150. :(

Your projects always sounded and worked well. Now with your new printer they also look fantastic!

Great vid as always!! I never get tired of these. It is such good referecne material.

Very good instruction, Manuel. I struggled with an FM car radio some days ago with the AM suppression along other problems. Part of the problem was "melted" polystyrene caps in the IF, believe they were affected by switch cleaner. Two of them were shorted, strange fault

Great FM video tutorial! Now , I hope we can hear you play those guitars! I built a VOX Jaguar Heathkit combo organ in high school in 1969, which planted the seed of interest in electronics. Iyour turtorials are immensely interesting and informative. Thanks for all you do from us in Bend, Oregon, USA

Shop Cat is wonderful. My cat foes the same.

Ive owned a 1000-1 ( heirloom, purchased on 1963) and a 3000. I notice the black binyl on the chassis shrinks over time, pulling away from the margins of the chassis. I jope there are replacement vinyl out there somewhere.

Thanks so much for this presentation. I own one and your expertise has been extremely helpful. Again , many thanks and please carry on with your tutorials.

Good tutorial on FM alignment Manuel and some nice and simple methods demonstrated to do it. (You missed the bit when a slug is stuck and the top of it cracks and you pull the module apart and damage the insides and it all ends in tears) Great video 😊

I got a little confused when you were peaking the IF coils by maximising the speaker output while frequency modulating the signal generator's 10.7 MHz output. I guess that could only work as shown if the IF coupling at the ECC85 is such that the induced signal is only just above the noise floor (c.f. your 2V) as with stronger signals I'd have expected a well aligned ratio detector to provide an audio output proportional only to the frequency deviation, not the signal strength. But maybe I'm missing something? It wouldn't be the first time. 🤣

Thank you Manuel. Your videos are always very informative and this one is among the very best. I'll bookmark this and watch it again next time I mess around with a FM receiver.

I guess the negative voltage level and then AM rejection is probably the easiest way to do it and as you've demonstrated using a sweep generator and looking at the shape of the response curve can be a bit time consuming for not much if any advantage in many cases. It's nice to play around though and see the different methods.

Can you add Turkish subtitles?

Super prefekt zresztą ja zawsze !

I think that the primary and secondary circuits of the bandpass filters in the IF amplifier are too weakly coupled (coupling coefficient lower than the critical one) and therefore it is impossible to obtain a transfer curve with two 'humps'. Greetings from Poland Manuel :)

Thanks for another informative tutorial. I always learn something from watching your channel, so thanks for that!

Pozdrowienia z polski

Enjoying the video { Maybe my last one } Flying to Madeira on Monday next scary landing , Beautiful Island , Take care 🙏.

Prof. excellent, I grant you tenure if I were on the board of examiners.

As you said, it's not complicated. But a guy name J.L. uses an SDR to align radio's, and he gets really lost and DOESN'T get it aligned correctly. Maybe he will watch this and "re-start" his brain! Excellent, Manuel! 👍

Excellent project. I see that it is powered by 12v DC but how much does it consume? What current does it consume? Thank you so much

Hi Manuel, I wondered if you encountered any Hot Chassis issues with this set, I have an 819 which has the same mains input set up and there is a capacitor between the on off switch and the chassis. If you use a non-polarised mains connector, which they all were at the time of manufacture, you can get 220 volts on the chassis - any thoughts? Great job by the way! Paul :-)

Great Video.found one at a pawn shop on the bottom shelf. Got for 100 otd. It works and is in good shape. Will take a closer look tonight with a cigar and some 12y Bourbon. Thanks..

Very neat! I must get off my lazy butt and get the mini whip I have installed. It's been sitting in my workshop for months and I have been dithering around wondering where best to place it. I think I need to stop procrastinating and get the thing up as they do look to work very well!! Impressive!!

I wonder what you need it for in future episodes 🤔🙂

You're a covid magnet Manuel. Well done once again and under duress this time 🙂

Dear sir, I have build this circuit and it works like a dream, but can you share the stl file of the box please?

So much effort in doing the circuit drawing clean up Manuel, kudos 👍 It takes some experience to get one's head around the ratio detector and how it works. In reality, you only need to be able to understand what it's doing and how to set it up. I learn a bit more each time I do one, I expect to learn more when I see you do the FM alignment. 👍🙂

Technical question, I have a Sony CRF-5100, the FM band is shifted forward, for example 99.9 appears at approximately 101. And sometimes some FM appears on the air band between 108 and 109. Do you know if it is something normal on these radios? Is it easy to adjust? Another issue is that sometimes on FM the light turns on and other times it doesn't.

Nice. I've been busy renovating a summer home here in the Catskills of NY for a good year so my radio projects have been on hold. None the less I do have the front end of a regenerative receiver off the dream board & on a piece of MDF board. Next but still on the dream board is a direct conversion receiver. I had mucked about, a year or more ago, with what claimed to be a mini whip, but in the end I assembled a 40/20 meter inverted V style fan dipole that works quite well for local traffic which is all that interests my QRP appetite in radios. I added a loop on ground to see if it lived up to hype & its still in place so its not horrible. It actually is about two S meter values quieter, but there is an over all signal loss too. On the other hand I tried a small magnetic loop transmit/receive antenna by using 4 inch aluminum clothes dryer tube for the main loop. This antenna is interesting. Its 4 feet square with a 23 inch square of copper pipe as the inner loop. Once you find the magic spot on the capacitor it becomes very usable for both receive & transmit. Its most efficient at around 80% on 20 meters, but is useful at 40 meters too. It has down sides but was fun to see a bunch of plumbing parts take on being a useful antenna & given a station within a couple hundred miles the darn thing does an excellent job at providing a bearing to the station.

Maybe you can make a separate battery pack module that is always being charged. You could have several voltages going out of the back of the module to feed all the modules as well as a jacks on the front if you needed a quick bench supply for testing. You’ve developed a very cool bench system. Well done!! 🙂👍🏻

As melhoras!

Could there be any problem with using another mosfet capable of 700v? What about 2w pot and 1n4148 If voltage is higher from transformer I have on hand?

Maybe 3D print some slots to slide the board right in. Great work. I love it. Thanks.

Aloha Manuel, sent some coffee and pastries $ for the family. Enjoy from one islander to another! All the best! I really appreciate & enjoy your work and videos.

Well done, as always. I would have liked to see the difference between direct connection of the MiniWhip and going through your un-un (or rather common-mode rejection transformer, because that's what it actually is), especially on long and medium wave. Maybe you could add this in a future video.

Challenge, make a project that PCB Way will sponsor, that will be popular with your wife and subscribers.

Nice! On another topic, and it's not something I ppersonally need, has anyone ever built a simple 3 kHz (plus possibly an additional 5 kHz) high Q tuned circuit filter plus a bit of amplification feeding into an AC millivolt meter? Why? I'm thinking a cheap and cheerful way to minimize THD during FM ratio detector alignment when the front end is fed with 1kHz FM audio. It doesn't have to be super accurate so long as you can see and minimize the 3rd (plus possibly 5th) harmonic. Or am I talking balderdash? 🤣

I would have put the LED and dropping resistor in parallel with C3. Then if the fuse blows you have an indication or rather a lack of one. :) I aways appreciate your videos.

As always another slick device! 😀👍 To reject spurious noise, I would aline the inside with aluminum and common-ground everything.