Love your builds KO, I know ive told you loads of times but they are great for teaching people how to quickly and easily prototype 👍👍 All the best Steve
@mariushmedias
3 жыл бұрын
Sadly, I doubt anyone would actually build such circuit when they can buy integrated amplifier chips for pennies, for example a tda2822 in dip package for 15 cents, or a couple tda2030 clones for 25 cents each.
@radiofun232
3 жыл бұрын
True. But the name of my channel is radiofun.
@edgaralbo6433
2 жыл бұрын
Is Always Better ti learn from the base. i do , do them. thanks. keep doing circuits
@tomashrabe9874
Ай бұрын
Yea, everybody can buy a module with ready amplifier, but its more interesting to make your own from basics :D
@edgaralbo6433
2 жыл бұрын
can i Also use this amplifier ti Connect RF stage of My radios
@radiofun232
2 жыл бұрын
Yes, though the output level is not so high, only 300 mW. I think that a 1 Watt amplifier will work better.
@radiofun232
2 жыл бұрын
Better schematic is on 0.28 in this video:kzitem.info/news/bejne/xY9utYGEiIFhgoo
@mechanicantiquesrestoratio8738
2 жыл бұрын
İf you have free time, can you share 3-4 watt amplifier please for the Record player.. With the pre-amp+amplifier, For crystal cartridge pick-up.. I have build of your circuits and always working good and properly.. Thank you very much.. And l have learned many usefull konowledges from you.. Thank you very much.. Have a nice day by health 🙏
@radiofun232
2 жыл бұрын
OK, good, I am going to search a few out of my video-schematics.
@mechanicantiquesrestoratio8738
2 жыл бұрын
@@radiofun232 Thank you very much.. I have did some circuits .. My purpose, l Want connect the card direct to Ceramic crystal cartridge and listenning record. On the İnternet available many circuits but with the IC.. I Will add it on the Portable record players.. My purpose is that.. I have did active volume tone and trebble control card.. I want to add it on the amplifier too.. Philips and other Portable record players has simple powerfull amplifier with the less companents. with the AC series transistor.. And working perfect.. But Hard to find the Germanium transistor now.. Available but very expensive.. I need on the same board simple preamp and amplifier... Together.. For ceramic crystal cartridge.. I hope you understood my purpose.. And so excuse of my Bad English.. 🙏🙏🙏🙏 Take care please and have a nice day.. With the health... 🙏 Sending my regards... 🙏
@radiofun232
2 жыл бұрын
Hi Mechanic Antiques restoration and repair: Nice sounding mono 5 Watt amp with 2N3055-2N2955 on 12-15 V kzitem.info/news/bejne/xKdozJhss3teoKA 5 watt mono audio amp with the TDA 2003 Chip kzitem.info/news/bejne/rImA1JiegWtmgGk 3 watt (max) mono audio amplifier simple/classic/BD 139-BD 140 kzitem.info/news/bejne/y4tsvH1okKJ4pKA 2 x 6 watt audio amplifier with the TDA 2615 (HI-Fi) kzitem.info/news/bejne/kp-axZeEnXZ9qag Classic audio tone control kzitem.info/news/bejne/mZyK4JqbqWeVoqA For a first idea: use the max 3 Watt audio circuit with the BD 139/BD 140. It could be that the output is too low for your application (!). In fact around 1 watt (not 5!), but with a good speaker in a good box it has (could have) “enough” sound. Takes max 300 mA. Second option is the TDA 2003. Really 5 Watt. Works on 12 Volt and was made for automotive applications. Easy to construct. Takes 600 mA-1 Amp. The HiFi circuit with the TDA 2615 has the Hi-Fi property, though it is stereo. You can shut 1 channel of with a 4 Ohm or 8 Ohm 3 Watt power resistor when it has to be mono. Works very good. A crystal or ceramic pickup element has a quite high output voltage (in the order of 400 mV-1 Volt) and can be connected directly to all these amplifiers. Though with vinyl records it needs a RIAA correction, so when you connect it directly there will be (in general) a poor bass response. That is why you also find the circuit of the “classic audio tone control”. You can search on the www for pre-amps with RIAA correction, for more circuits. In general a 1 transistor pre-amp can do the job, given the high output level of a ceramic/crystal pickup element. In my book (description in these video’s, named “Schematics 2, audio amplifiers and loudspeaker boxes” on the LULU website) is more info. When you go to my Channel Trailer: go to the "looking glass" and search with keywords like “pre amplifier” ”audio amplifier”, “tone control”; perhaps also the term “RIAA” will give a hit to a video/schematic on my channel. Thanks. 17 april 2022.
@radiofun232
2 жыл бұрын
@@mechanicantiquesrestoratio8738 No problems with your English, I am Dutch. Perhaps the answer that I have given will point you in the right direction. If not, tell me.
@radiofun232
2 жыл бұрын
This is a RIAA tone corrected pre-amp.Video link kzitem.info/news/bejne/tqCDmZ-VqGh9mn4 Problem with this circuit is, in your situation, that it is made for magnetic coil moving element, not for a crystal/ceramic pickup element. So you have to replace the pickup coil with a suitable voltage divider (2 resistors) to which the ceramic pickup element can be connected. Even so: perhaps small changes to the 2 tone elements (R-C) in the transistor circuit must be made to make it sound the way you like it.
@bblod4896
3 жыл бұрын
Driver and Final transistor bias on RF transmitters are adjusted with a diode mounted on the transistors. It helps reduce runaway current flow as the transistor gets hot. Great video Ko, thanks.
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