I just found your channel after watching dozens of Mr Carlson's videos, and I joined your Patreon channel immediately. I don't want to make my own PCBs and I don't want to use surface mount components, so I am so glad you use through-hole components and make the Gerbers available. PCBWay's pricing is ridiculously cheap, so I will make some of your projects very soon.
@electronicsoldandnew9 сағат бұрын
Welcome to the channel and for your support. I really appreciate it. I prefer to make the Gerbers available as for some people the shipping can be quite costly. Personally I actually like SMD, but many have problems with it, so k normally opt for through-hole versions as it’s more generally preferred. If you have any questions, feel free to ask through patreon. I’ll be happy to help where I can.
@dougietamson18 сағат бұрын
A while back I made a solid state ECC83 with a couple of these but stuffed inside a dead Mullard ECC81 using the original glass envelope, kzbin.info/www/bejne/i5zYZXdtmc6VnNU
@darrenmurphy6251Күн бұрын
would it be correct to say using a mains transformer, the dc to dc convertor is no longer needed because you already have isolation /no ground loop (hum) or are you still needing to isolate digital earth from analog earth to prevent digital noise breakthrough?
@electronicsoldandnewКүн бұрын
It is probably not needed with a transformer for that exact reason, but I haven’t experimented with it as yet. Just wanted to see what would be needed to make the same circuit work on a hot chassis.
@JacobGestmanКүн бұрын
I enjoyed watching and listening and thank you for inviting us into your experiment. There is one remaining question and that is the cathode resistor, You need about 0,4 milliamp. And to obtain that, you need about a 10k resistor. So far so good. You bring that resistor into the socket. But you, or someone else, next time perhaps will need 1 milliamp or 2 milliamp and thus will need another resistor value. In that case this particular solid state socket won’t work properly. Another resistor value will be needed. So the solid state replacement isn’t interchangeable flawlessly. It will need a dedicated approach for every application. And as you introduce a carhode resistor that was zero in the original situation, the AC amplification will drop. I didn’t hear you talking about that.
@electronicsoldandnewКүн бұрын
Welcome aboard 😊 I did mention that the resistor value was found by experiment, and would probably differ from care to case. This wasn’t meant as a general replacement, but rather as a personal attempt to get it to work. Also, in a situation in which the triode is cathode biases, a resistor will already exist, so I’m not sure how this thing would bias.
@JacobGestmanКүн бұрын
@@electronicsoldandnew Yes indeed you mentioned it. but it raised a question. Would it be possible to construct a real solid state pin to pin replacement of a valve (or tube) that would be a universal and real equivalent? And secondly. I find a lay out without a cathode resistor as surprising as you. You didn’t use the simplest scheme to test your knowledge. But it was very entertaining to see.
@electronicsoldandnewКүн бұрын
I think that a direct replacement for a triode that uses fixed or cathode bias is possible, but not guaranteed because these fets are notoriously different, even from the same batch. Gris leak bias is a different story 😊
@tonec3663Күн бұрын
Manuel, I've wanted one of those ELV signal generators ever since you first introduced them to us on your channel. The company does not export them to North America. I don't know if this is some sort of legal thing or just a business decision but I think that it is missing out on a large market.
@electronicsoldandnewКүн бұрын
I believe it has to do with export restrictions, but do not have the details. It’s a pity, since it’s a great little device.
@JacGoudsmit2 күн бұрын
It would probably be a good idea to use a fuse for the transformer primary and secondary winding.
@electronicsoldandnewКүн бұрын
👍
@petersdelucaaa2vg3062 күн бұрын
Hi Manuel. Will you be posting the board that uses the magic eye tube as a turn on/off circuit for the module soon. I would like to order them together in one shipment. Thanks for this useful video as my Zenith has a hot chassis.
@electronicsoldandnew2 күн бұрын
Yes, they’re on their way to me right now 😊
@pir8692 күн бұрын
I've been switching over to smd as much as i can,i had to buy a digital microscope though,i find i can miniaturise a circuit much more,for power supplies etc it is great,some audio circuits still work better with a more spaced parts placement like sub min tubes,though again the circuit does still shrink some what. My microscope set up is two parts ,a small one with its own screen and a second camera with a 17 monitor,the camera gives full board view at great magnification the small combined unit is more for late night quick checks on pcb soldering and viewing not for hours of work.
@electronicsoldandnew2 күн бұрын
Personally I like SMD, but many hobbyists have a problem with it. My microscope does come in handy 😊
@pir8692 күн бұрын
@@electronicsoldandnew yes smd is great to a point,try getting poly type caps,high volt resistors and caps tend to be very pricey. I tend to mix smd with tht,fitting some of the circuits i NEED to have in the wanted size enclosure for a current design has been a serious journey,smps,inverter,flipflop switching a two stage op amp plus a dual triode sub min tube,never mind sockets pots eq etc etc intp a hammond 1590BB,it will happen but it's been a trial,SMD has a major advantage for space saving ,noisey circuits can be kept further away .Again some vendors go insane on parts used by the stomp box diyer fraternite like LT1054.
@electronicsoldandnew2 күн бұрын
I built some stompboxes in those cases. Quite a challenge 😊 with SMD I made good use of both sides of the pcb to fit everything in.
@josephmagedanz40702 күн бұрын
Brilliant! Thanks for sharing.
@electronicsoldandnew2 күн бұрын
Pleasure
@zzzdogutube2 күн бұрын
Why don't you design a circuit so you can't plug it in wrong? Have the circuit flip the hot and neutral the correct way or not allow the radio to have power to the chassis.
@zzzdogutube2 күн бұрын
Why don't you design a circuit so you can't plug it in wrong? Have the circuit flip the hot and neutral the correct way or not allow the radio to have power to the chassis.
@electronicsoldandnew2 күн бұрын
That’s not something I care to do, as most people have already found a way to use their radios safely.
@erikdenhouter2 күн бұрын
When you are stil afraid that the audio ground gets on the live mains, you can put in the soldered audio ground a large capacitor, but it would be a 400V 8µ or so. I don't like the sound of 230V getting in your BT board, it is original not designed for that.
@electronicsoldandnew2 күн бұрын
The cap would indeed make it safer, but the mains getting to the board is t a problem as long as it doesn’t get anywhere near anything at a different potential. Effectively all you’re doing is elevating the “ground” reference, which isn’t normally a problem.
@MrMersh-ts7jl2 күн бұрын
You can use that miniature transformer in conjunction with a switch and wire it to the volume pot, using the switch to disconnect the radio signal, and add a 3.5 mm jack. On that 3.5 mm jack you could add a wireless Bluetooth dongle as another solution. Fantastic schematic and adaptation of your creation.
@electronicsoldandnew2 күн бұрын
👍
@MrMersh-ts7jl2 күн бұрын
@@electronicsoldandnewI just want to tell you that I really enjoy your channel and your presentation. In the States I don't get a lot of these types of radios to work on so you are and invaluable source of experience and information. Thank you
@electronicsoldandnew2 күн бұрын
My pleasure
@BobAndersson2 күн бұрын
I am amazed that the EU never passed a law requiring all member states to standardise on the three-pin mains plug we enjoy here in the UK. 🤣🤣🤣 Yes, that was really realy naughty of me but I hope you get my drift. Here in the UK we're not that clever either with our reversible bayonet mains light sockets. I'd outlaw those as well as it's possible to buy B22 socket extension plugs. ⚡ 👿
@electronicsoldandnew2 күн бұрын
I agree with you completely 😊 it would be so easy as some of these plugs have a hole on one end which would only require the sockets to have a protruding pin, but I guess they’re being stubborn in this issue.
@xsc10002 күн бұрын
@@electronicsoldandnew France and other countries plug have 3 pins, but there is no defined neutral wire position, only the ground/protective one. And you can still use 2 wires plug which you can connect both ways. 3 pin with defined ground is only required for devices with metal cover. Btw british plug is too big. Btw Im dissapointed by the design of this little Grundig radio, that there is phono input directly connected to chassis. Standard way for hot chassis radio was to use audio isolation transformer for phono input. Antenna was always protected by small value/high voltage caps (now we call them Y2 caps).
@electronicsoldandnew2 күн бұрын
Yes, it’s a pity the plug issue hasn’t been standardised and regulated all over Europe. In Portugal we have no protection as regards mains polarity. The Grundig was a surprise indeed. Initially I didn’t realise it was an auto transformer, and the worst part was the phono ground to chassis connection. I wonder how many people got shocked over the years … totally needless. A proper transformer would have cost very little more than this one, and all the danger removed from the set.
@xsc10002 күн бұрын
@@electronicsoldandnew There were planty of hot chassis sets in 40s-50s. Copper was expensive, so transformers were expensive too during war and postwar years. But I never saw set where you can touch hot chassis without opening back cover. It looks like error. There is no way how to standardize plugs across Europe - it would be too expensive, you would have to rebuild all electric installation. We in Czech republic also dont have polarized plugs, we use french standard designed in 1920s. German standard doesnt have it too, both wires should be considered as possibly hot.
@electronicsoldandnew2 күн бұрын
👍
@tubeDude482 күн бұрын
Well done my friend! 👍
@electronicsoldandnew2 күн бұрын
Thank you
@user-kv7jj6gt4f2 күн бұрын
Greetings From Germany... A question concerning identifying the chassis ground transformer of the radio's schematic and then comparing it to a similar model that has an isolated ground. Is it possible to make a supplementary video or Part 2 just to show us viewers exactly what to look for on the schematic for a positive identification of chassis ground.
@electronicsoldandnew2 күн бұрын
You can easily see it from the schematic. One side of the mains is shown as grounded. You can also just test with a multimeter as I did at the start of the video.
@erikdenhouter2 күн бұрын
@@electronicsoldandnew I think to remember that you forgot in the schematic to show that one side of the 6.3V filament winding of the transformer is connected to ground. You told it, but it is not drawn. Maybe that is the confusion here ?
@electronicsoldandnew2 күн бұрын
Perhaps, but the ground is shown. Not sure I understand the question
@mackfisher44872 күн бұрын
Nice addition to your Bluetooth lineup Manue, The only trouble is Bluetooth is you can't transmit simultaneously to one's whole radio collection. Coming up with a legal AM transmitter with good audio would be nice for the collector, but offers some serious problems.
@electronicsoldandnew2 күн бұрын
True.
@ralphj40122 күн бұрын
Can't vouch for this but there is a seller on ebay (orient100) creating Bluetooth to AM radios supposedly not exceeding 50mW (below the unlicensed limit in most countries). They can trim the frequency to suit. Not cheap, but may be a solution.
@electronicsoldandnew2 күн бұрын
Will have a look at it. May be interesting
@rolfingerbier2 күн бұрын
Hello. Thank's for the Video. So, the 4VCW is an 2SJ245 ?
@electronicsoldandnew2 күн бұрын
Check the video again. This repair was done some time ago and cannot recall the details.
@csongorecsongi16013 күн бұрын
Hello i replace sometimes EABC80 with 3x1N5711 diodes and one russian 6N2P double triode. One section for preamp an one section for Phono preamp (bluetooth)works well and a radio maintains retro look.
@electronicsoldandnew3 күн бұрын
👍
@newtronix4 күн бұрын
Why?
@electronicsoldandnew3 күн бұрын
Why not?
@mjavedshams84755 күн бұрын
Recently I did restoration of 1969 Philips Prestige all valve radio. Band switch which is rotary wafer type is giving some trouble. Can you suggest remedy?
@electronicsoldandnew4 күн бұрын
Clean it and lubricate carefully.
@Steaphany5 күн бұрын
It's good hearing you start out with a warning about the tube B+ voltage. Many years ago, while in high school, I was at a bench doing lab instrument repair while another student sat next to me working on a tube based CB transceiver. The chassis was frightening as it looked as if someone dropped components and soldered them where they landed. After a time, this student suddenly gripped the underside of the chassis with both hands. His body went limp and he slid off the stool falling to the floor, both hands still gripping the chassis, the bench mains power remained hot. Right behind me and over my right shoulder was the power kill switch for the lab. Just moments from when the guy landed on the floor, I hit the kill switch. The attending teacher and other students in the class had no idea what transpired. Fortunately, the student on the floor recovered immediately upon power having been shutdown, but both his hands were covered with burn blisters and skin punctures from the intensity of gripping the chassis.
@electronicsoldandnew5 күн бұрын
Yes, one can quite easily forget the seriousness of a shock. I’ve had a few, and have been fortunate, but it is always important to remember and remind others of the dangers.
@EI6DP6 күн бұрын
Where can I purchase the PCB's
@electronicsoldandnew6 күн бұрын
It is all described in the video description.
@audiovideoguy03926 күн бұрын
Manuel, I have a 6000...will not turn on, DC or AC. 12vac is coming out of the xfmr. Were the caps bad on your PS? Do you know if it powered up prior to replacing? Thanks....David in TX
@electronicsoldandnew6 күн бұрын
I’m afraid it’s been quite a while. The videos probably show the initial state of the radio.
@haggy386 күн бұрын
Hi will you share the stl file?
@electronicsoldandnew6 күн бұрын
Sure, email me.
@980ssbbearcat26 күн бұрын
I like the KISS (keep it simple stupid)method better.
@DAVIDGREGORYKERR6 күн бұрын
I wonder why there aren't direct replacements with a 12V heater and a B+ of 12V so the PSU could be replaced with a socket and the radio run of a computer PSU giving 12V and a special transformer used to drive the speaker, it would mean no danger of electrocution.
@DAVIDGREGORYKERR6 күн бұрын
Was someone in a fit of rage when someone ripped out some of the wires of the radio.
@electronicsoldandnew6 күн бұрын
😊
@josbouten6 күн бұрын
I'm wondering whether the 0V 'out' of the B0505 is connected to AGND. It does not say in the schematic, or am I missing something?
@electronicsoldandnew6 күн бұрын
It gets connected through the BT module itself.
@josbouten6 күн бұрын
@@electronicsoldandnew Just to make sure I understand. The 0V Out of the B0505 is connected to the GND terminal on the Bluetooth module?
@electronicsoldandnew6 күн бұрын
Internally, yes.
@dhahimoharib97266 күн бұрын
If you put batteries in the radio and turn it on, the batteries get hot and it doesn't work.
@electronicsoldandnew6 күн бұрын
You need a proper repair done on that radio. There’s obviously a short somewhere.
@kilcar7 күн бұрын
Call the National Trust!
@kennethiman26917 күн бұрын
Love the board. But $26 shipping for 5 boards in the US is nuts!
@timpsensky51815 күн бұрын
its been a while since i used PCB Way, but there should be a way to select cheaper shipping options at checkout. Otherwise I would download the gerbers and use JLC PCB. Should be able to get 5 boards for $2 plus $1.50 shipping for the cheapest/slowest option.
@electronicsoldandnew5 күн бұрын
There are various shipping options. I normally use the fastest, but that’s my personal choice.
@yannistzavaras43437 күн бұрын
BTW Mr Caldeira is the main reason why I ve gone back to this hobby after 45 years messing around with digital and software. Thanks !
@yannistzavaras43437 күн бұрын
Hi, nice video, well done as always. Just wondering since you've gone to the trouble (correctly) of the DC/DC converter why have you left the chassis ground of the split rail power supply as is ? Surely there is room for a ground loop between the audio ground and that ground ? Options could have been a single rail op amp(s) or a DC to split rail DC converter ? Just saying..
@electronicsoldandnew7 күн бұрын
The ground of the opamp supply is effectively provided by the ground connection of the audio connection to the radio. This was the quietest solution I was able to find after numerous attempts. I needed a split supply and did not want to use a doubler to get a higher DC voltage to use a single supply opamp configuration, so I ended up with this solution.
@yannistzavaras43437 күн бұрын
@@electronicsoldandnew anything that works is good enough for me. keep up the good work
@electronicsoldandnew7 күн бұрын
👍
@Bus20008 күн бұрын
Both my donor and the one I'm restoring the 10.7 if was shifted about 400KHz up. at 1st I thought the counter was off. But after I calibrated the frequency counter it was still not ok. I had to adjust the IF section now the frequency reading is Ok again. Not easy to access all of the transformers and trimmers.
@electronicsoldandnew8 күн бұрын
Yes, access can be challenging on this radio. The result will be well worth it, though 👍
@mariusdeetlefs3518 күн бұрын
Hi there. Do you have a “parts” list for the completion of this mod for the noobs? Thanks
@electronicsoldandnew8 күн бұрын
Nope. The video explains it all and the schematic can be downloaded. See the video description
@lawrencehalpin66118 күн бұрын
Thank you.
@electronicsoldandnew8 күн бұрын
Pleasure
@BobAndersson8 күн бұрын
I'm keeping everything crossed that I can use the forthcoming switch module with your v2 Bluetooth board of which I have several already built up. It'll solve a problem as the Saba Freudenstadt 9 I've just done has no spare contacts for supply switching on the PU switch and I don't want to do a hardware modification to add a microswitch as I want to keep this radio as original as possible. Thanks for sharing these projects. 🙏
@electronicsoldandnew8 күн бұрын
The add-on PCB will simply act on the incoming 6.3VAC so the previous boards should work just fine.
@TheEmbeddedHobbyist8 күн бұрын
interesting you don't seem to have a connection between the isolated 0V and Aground. I can't find a description of the chip only the module, but doing this could cause the chip problems as the digital side of the chip's ground is isolated from the analogue ground side. so it's a bit like trying to pass a signal between a source and an amplifier with only one wire. Normally you would sort out this issue with a star ground so the digital and analogue grounds are separated right up to the last minute. so currents flowing in the digital ground are not superimposed on the analogue ground. they same way that you do with A2D's Ref-grounds, they need to be connected to work but you connected them in away to reduce or eliminate digital ground noise. i suppose the other way is to use a 1:1 isolation transformer on the audio but they are not as cheap. Anyway thanks for giving me something to think about on a Sunday morning. I'm looking for a nice Bluetooth module to go the other way. which is much harder to do as a standalone module. I want to take an audio source and connected it to a Bluetooth headset, but how you get the headset to connect to a module without handshaking controlled by the user?
@electronicsoldandnew8 күн бұрын
The isolated 0V is connected internally to the AGND at the module output. Internally it has the separation of the analogue and digital grounds, so the ground reference is achieved with no noise. I tried numerous grounding schemes before this one and they simply did not work. The noise was a constant issue until this version finally resulted in noise-free audio.
@TheEmbeddedHobbyist8 күн бұрын
@@electronicsoldandnew you might get less noise if you cut the connection between the Aground and 0V on the module and reconnect them at the point where you connect the ground to the radio. this will give the best noise performance you could expect. Moving the star ground right up to the last point possible. if the module was done correctly they would have separated them on the PC and told the user how to connect them correctly. the way they have done it only breaks the paths the last inch or so. not much point in that if the ground from the board to 6" or more long.
@electronicsoldandnew8 күн бұрын
These modules come with zero info 😊 Fortunately the noise is not at all audible as it is right now. The noise pickup on FM is there regardless of whether the module is connected to the radio or not. I experimented with an externally powered module (not at all connected to the radio) and got the same result.
@TheEmbeddedHobbyist8 күн бұрын
@@electronicsoldandnew in all my years of integrating audio systems into aircraft, ground loops and noise were a real pain. trying to find a ground for your audio that was not going up and down due to currents flowing from other high power controls was like looking for unicorn poo. Made even worse as controls moved away from hydraulically powered to electrically powered. Now there are vast amounts of current flowing in the airframe, which makes it hard to find a stable ground. We started to use fibre optics to stop radiated signals from our systems, but it also meant that we had local grounds that were isolated. so no ground currents causing us more noise issues. Now i just sit back and play KZbin much less stress. 🙂
@electronicsoldandnew8 күн бұрын
I can imagine the headaches trying to find loops in a plane. Not exactly something you can ignore and hope for the best 😊 You’re right: KZbin is a lot simpler 😊 For me, it serves as a platform to learn constantly. I remember our Dean saying on the first day of university, that we’d leave that institution knowing quite little, but being experts at learning. Nearly 40 years later, experience has taught me that he really got that right 😊
@Bus20008 күн бұрын
I now own 2 of this Grundig radio's both missing knobs and some other cosmetic issues. Now I'm building 1 out of 2 and you're videos will help me absolutely. Replacing the tantalum cap's to prevent failure. Many Thanks. And Yes the FM reception is amazing on these radio's.
@electronicsoldandnew8 күн бұрын
👍
@LanceHall9 күн бұрын
I wonder if someone could take a vintage tube TV/radio and add a daughter board and a duplicate audio section with an extra speaker and decode and play stereo audio. You'd have to capture the audio signal, decode the channels it and send one channel to the existing audio circuit and the other channel to the extra audio circuit and speaker.
@wv1vsu9 күн бұрын
Thanks ❤
@electronicsoldandnew9 күн бұрын
Pleasure
@robertjames13069 күн бұрын
Thank you , this is a good blue tooth receiver. I have made it and installed on 4 German radios . With a mirco switch for the power on . Would like to improve this using the magic eye voltage .
@electronicsoldandnew9 күн бұрын
👍
@boriskolev95139 күн бұрын
very good explanation and straightforward approach to explain possible problems. I had two times problems with interference between Bluetooth module type M18 and the preamp 4558, the solution was to put the module about 10cm away from this pcb!
@electronicsoldandnew9 күн бұрын
I went through all those issues 😊 this solution works for me. I’ve used it in over 20 radios.
@opanick749 күн бұрын
In my tube radio project I have sacrificed the "local/distant station" option and use its switch to supply 5 v to the Bluetooth module, while in transistor radio use a pair of contacts of the fm switch to the antenna socket. Just surgery.
@electronicsoldandnew9 күн бұрын
👍
@haraldlonn8989 күн бұрын
Great made. What if the fillament is not connected to ground? There is a way to use a DC to DC converter that has 2x9V but I think it is overkill. Keep up the great videos.
@electronicsoldandnew9 күн бұрын
I’ll be doing a video soon to cover those situations. Should be a small adjustment.
@hooshangyadegar12509 күн бұрын
Very good .
@electronicsoldandnew9 күн бұрын
Thank you
@spectrum8629 күн бұрын
Newbie here is there circuit for ac/dc radio? That's what we have in the States mostly, great educational videos!
@electronicsoldandnew9 күн бұрын
I think I’ll make a video soon specifically for the ac/dc radios. Won’t take too much adaptation as the boards will probably work.
@GJackie249 күн бұрын
Wow great episode. That board came out beautiful !!! Love those isolated power modules. I have used them myself. Great for lots of things...