Regen LowV Part2

Let's start building the Low Voltage Regenerative Receiver. The hardest part is starting!

[@petertyrrell6690]

I have found that gluing aluminum flashing to 1/4" thick wood material, makes an excellent shield; it's dirt cheap and can be cut with wood working tools.

[@MIKROWAVE1]

Nice trick!

[@MauriatOttolink]

Peter Tyrrell. Aluminum glued to 1/4" thick wood. Now, ain't that just, one good idea! Thank you.

[@Steve-GM0HUU]

Now, my wife keeps asking me if I have seen her bread board! Thanks for posting. Lots of good advice there. Regen receiver project is on the "to do" list - assuming my wife doesn't find out where I stashed the bread board.

[@MIKROWAVE1]

That breadboard was contaminated and it needed to be replaced :)

[@user-dh1kq3eh8q]

Bravo profesore.tako lepo objašnjavaš da te svi rado slušaju. 73 od Yong - milan

[@acestudioscouk-Ace-G0ACE]

Some useful tips here for this beginner. Thanks.

[@stevenlitkey9354]

I love your broadcast band radio builds, both crystal and the simple regens. This looks like another great one. Any chance you could delve into that little beauty you showed at the end of this vid ?? Possibly a view inside and maybe schematics and such ? For the most part that's how I build my projects, in nice little wood enclosures, even most of my crystal builds !! Great stuff, keep it coming 😁😁

[@adzbasslines268]

I've built several Hartley's and Colpitts types. It will be nice to tick off the Armstrong as a low voltage example! I think I'll go with a metal open box type chassis with the point to point wiring accessible from the bottom and tubes mounted on top with the tuning cap remoted to the metal faceplate and volume and Reaction controls mounted in the side of the chassis, sliding the shafts through the faceplate holes! I'll shield a power section for a 24VAC transformer, rectified and filtered from mains power. I might go with a tube output transformer to a small speaker. I did manage to find surplus 12AV6 for $5.90 ea and 365 pF single section 350v Air Caps for $17. Feels like I'm getting ready to build a Heathkit!

[@tonychristoph1063]

thank you from France

[@MIKROWAVE1]

récepteur à réaction- Récepteur à 4 lampes TMC; A une portée d'environ 500 km. A été utilisé pendant la Première Guerre mondiale par l'armée du Rhin pour communiquer avec la tour Eiffel. La vanne TMC a permis l'utilisation de vagues inférieures à 600 mètres. La Science et la Vie, Mars 1920

[@franpin3924]

Thank

[@lazyfox1954]

If you don''t have any aluminium for the front panel, you can use a sheet of single-sided copper-clad board.. The copper side should face backwards, and you can cut away the copper around the hole for the 'phone jack, to prevent a short. Nice project. 4X4LF

[@MIKROWAVE1]

Nice idea.

[@EmersonCapuano]

Very cool 🙂👍

[@Broken_Yugo]

Solid core #18 bell wire is cheap, available at every hardware store in 25 or 50 foot coils, and works well for old school breadboard construction. Insulation isn't the most tolerant of less than ideal soldering technique though.

[@MIKROWAVE1]

Cheap is good! But what do I do with the bell?

[@TAC19jm]

very nice!!!

[@stevenlitkey9354]

Hi Mike, great little build series. I have a question about some of the cap values on the schematic. Caps C2 , C4 , C5 , & C8 all have just a number value. Can I assume those are all pF or is that incorrect ??

[@MIKROWAVE1]

Generally yes; no suffix means pF. so a cap that says 100 is 100 pF . A resistor that says 560, is 560 Ohms. etc..

[@franpin3924]

Thank. Very goood you video friend. You is one expert and crack.

[@MIKROWAVE1]

Thanks Fran - my wife says i'm cracked - is that the same?

[@MauriatOttolink]

Preferred Regen..Capacitor throttle or potentiometer? Previous regen. built in the late 50s used two 954 acorn valves. OV1 style. The plates of the 954s were ..no connection ... but the screen grids were used as anodes. Any idea what was behind that? 2nd question.Have you ever seen valve bases for acorn tubes these days? 73 de G3NBY. (Former Colonial Oppressor. No taxation without Representation.) PS Thank you for suggestions about the lumpy, vernier reduction drive.

[@MIKROWAVE1]

Triodes? - Throttle cap - Pentodes ? Potentiometer on Screen. That has been my experience.

[@SalvoMorina]

Nice.....I would like to make one for short wave (and two ultra-miniature Raytheon tubes).

[@MIKROWAVE1]

Yes why not? I have a few of those.

[@MrSteeleye]

Greetings from Downunder. I have a question. Could reflexing be achieved by coupling the output of V2 through a capacitor to the grid of V1?

[@MIKROWAVE1]

Reflexing is a wicked game that really brings some fun into any project like this. The trick is bypassing and keeping the two (or more) frequency ranges separated- Audio, IF, RF, BFO, Oscillator etc..

[@HulseFamily2614]

I'm a beginner but I would love to start this project. I'm not experienced in schematics so I dont really understand where to start. If there are any easier blueprints and a parts list I would love the help. Any other help with this project would be very nice.

[@MIKROWAVE1]

Check out my Facebook Mikrowave1's Radio Resource page for more help.

[@DAVIDGREGORYKERR]

TELEFUNKEN GMBH Space Charge Vacuum tubes are most likely still available, has anyone purchased 8 or 9 KORG 6P1 vacuum tubes and built a radio with them i.e a flat vacuum tube, three of these flat tubes can be configured to operate exactly like the SO42P with a B+ OF 50V and a heater voltage of 3V and you can take half an Integrated Circuit socket for tube sockets.

[@MIKROWAVE1]

Ya Vol! Telefunken! Die besten Ventile der Welt.

[@MIKROWAVE1]

Vakuumröhren

[@call5sam]

Why do you not use the standardized wiring code for signal paths?

[@MIKROWAVE1]

I will have to refer to my Allied Electronics Standards book!

[@erikburman530]

I have some 12AV6's in my eBay cart waiting for me to click on "Buy." Still waiting to see how this turns out and for you to post a schematic. Remember, you said that this is supposed to be a beginner's project. But so far, it kind of feels like a project that allows you to show off your knowledge to beginners. I hope this comes together somehow so that I can build it for myself. It would be very helpful if somewhere along the line you would post the final schematic and BOM, please. Probably would have worked better if you had done that up front.

[@MIKROWAVE1]

Yes the final schematic will come when the unit is finally working - ha. A lot of folks apparently like the dual triodes like the 12AU7. Well sure - but I wanted the freedom to go 12V or 24V and try both voltages and compare results. So maybe two 12AU7's and you get an extra pair for more amplification or buffering.

[@DAVIDGREGORYKERR]

@@MIKROWAVE1 What about using two KORG NUTUBE 6P1 units and using one as the front end and one as the output stage, the heater will require 1.5-3V and the B+ 9-18V and you can use a 24 pin IC socket.

[@Screamingtut]

way cool

[@MIKROWAVE1]

Time to get out the soldering iron and build the Regen and power it on a solar panel for camping!

[@julianvalenti]

Hi. I am going to make this project. Can I use an stereo phone jack connected in left and right terminals and leave unused the ground part? Or may be a problem with it. And... What about to use 12v of the car for filaments and 2 9v batterys in series with 12v to supply the plates. Is ok to use 30 v? Thanks to share your experience. My best wishes from Mataderos, C.A.B.A., Argentina.

[@MIKROWAVE1]

A good trick that will eliminate the shoulder washer! You would use tip and Ring and not the grounded sleeve. The results with more voltage would be more audio volume.

[@julianvalenti]

@@MIKROWAVE1 thanks you! Now I'm selecting all the materials to make this regen. Is the fist one that I will build and You are my teacher. I have encounter very intresting and didactic all your material. By other way I really speak spanish, but I have been learned a little bit of english. So I don't know which is the right title to somebody like you who has a. Big knowledgement in a tech cuestion. Something like thanks you genius or thanks you professor. Something unformal but respecfull. Ok, now "I leave the poncho" like we say in Argentina when one end a very long speech in an amateur conversation. Waiting the third part of the project I send you the best!

[@MIKROWAVE1]

I suspect already that triodes with less GM (gain) are better candidates than the 12AV6. All of the 12AT6 tubes that I have tried work at lower voltage. I suspect that the 6C4 and 12AU7 will be excellent choices. We will find out soon.

[@julianvalenti]

@@MIKROWAVE1 Hello! My tubes may be any of both. I will wait for the coil and tunning instructions to test the results! I see You soon!

[@julianvalenti]

@@MIKROWAVE1hello! my tubes may be any of both. I will wait for the coil and tunning instructions to test the results! I see You soon!

[@cooker4409]

where's part one, and three???? love the video....

[@MIKROWAVE1]

kzbin.info/www/bejne/npSVZpuCjMetfKc

[@cooker4409]

@@MIKROWAVE1 thanks, bud.....will look now....

[@cooker4409]

@@MIKROWAVE1 quick question.....I have quite a few 2 and 3 gang variable caps.....I saw that you only use one for the BCB.....what if I wanted 160, or 80, or closer to 5 or 7 mHz.....would i use a different section? No joke.....I have quite a few older parts, coils, sockets, 1,2,and 3 gang var. caps.....need to do something with them....they guy's family dumpstered many parts, but I got the rest....and some radios as well.....one works, and the other was an IC-7700 w/bad finals......$900 later, I have a $6K radio.....and a butt-load of extra parts (IC's, transistors, caps , resistors, coils, cabinets).....a junk box dream....

[@cooker4409]

forgot I saw the first one....my bad....

[@MIKROWAVE1]

@@cooker4409 for ham band Regens where you are doing CW and SSB, you normally only use 1 365 pf section as the band set, in concert with a band spread variable of say 25 to 60 pF that is the actual main tuning. To do 80 and 160 maybe 2 sections to hit both bands in one sweep, but again the band spread is the actual tuning.

[@user-dh1kq3eh8q]

Yu 1 Qg m i l a n.....