I wind a turn, measure it's length and multiply by the total number of turns to get the total length of wire. I've even been known to do a practice run with string when my stock of wire was low! I noticed that the turns calculator you show in episode 1, tells you the length. That makes things easy! Thanks for the video.
I use my digital calipers to measure toroid height, then measure the width of the toroid circumference. Add these two together, multiply by x2 and multiply by number of turns. Finally, add 4cm. This gives me total length of wire to cut off reel to wind the coil. It works for me.
@M0NTVHomebrewing thank you sir. I have a pretty decent collection of bench gear already. I don't have an sa but I have 350mhz mso. Should I hold off on getting an expensive Siglent SSA3021X PLUS. Or what do you recommend? Just start with a decent radio and a tiny sa then play with making rf filters and such. I understand most of the math but until now it's all been theory based and taking notes and I've accumulated enough quality components to actually advertise them locally because there is no walk in shop for parts in my province of nova scotia haha. I'm hoping to be the source of parts for the engineering programs in the new college that is about to open. Anyway, that's beside the point haha. I have all sorts of different types of enameled copper wire but I've always been hesitant to purchase crystals, toroids and variable capacitors. I guess I have to get to reading and take it slow. Rf has always seemed like the dark arts of medieval wizardry to me haha. Thanks for the reply and great content!
Personally I would hold off on buying the Siglent until you've got stuck into some RF construction. A Tiny SA will help but so will an SDRPlay RSP1 plus computer. It costs about £100 UK and will enable you to see (and hear) the signals you produce. There is even some free SA software for it. Don't get me wrong, the spectrum analyser is brilliant and I wouldn't be without it now but I'd already scratch-built 4 complete SSB transceivers before I got one! As always, your mileage may vary. 73, Nick
Hi! I think you mean a T50-2 toroid. '50' refers to the diameter and '2' is the type of material that it is formed from. You can find them all over the internet with a quick search. But just be careful that you are satisfied that the person selling them to you knows (and cares) what they are. Don't just trust the colour! Personally I use a combination of a few trusted eBay sellers and Club Sales from the GQRP Club. They are not too pricey for this size but costs increase with the size and weight of toroids. Hope this helps. 73 Nick
@@drstrangelove09 If you are looking for a good source of toroids then on this side of the Pond I would recommend 'Spectrum Communications' - based down the road from me in Dorchester, Dorset. They have an eBay shop too - just search in eBay for 'spectrumcomms' and you should find them. 73 Nick
NP0 - they are more expensive but don't change their capacitance very much when their temperature changes. You can get away without using them but obviously if you do have some then they will be more consistent in their performance. Generally tuned circuits will benefit from NP0 or C0G capacitors but again you can build with regular caps. Don't let it put you off!
I wind a turn, measure it's length and multiply by the total number of turns to get the total length of wire. I've even been known to do a practice run with string when my stock of wire was low!
I noticed that the turns calculator you show in episode 1, tells you the length. That makes things easy! Thanks for the video.
I use my digital calipers to measure toroid height, then measure the width of the toroid circumference. Add these two together, multiply by x2 and multiply by number of turns. Finally, add 4cm. This gives me total length of wire to cut off reel to wind the coil. It works for me.
Thanks Steve. 73 Nick
I just ordered my ham book for the test haha
Well done ... now the work begins! Enjoy the journey. 73, Nick
@M0NTVHomebrewing thank you sir. I have a pretty decent collection of bench gear already. I don't have an sa but I have 350mhz mso. Should I hold off on getting an expensive Siglent SSA3021X PLUS. Or what do you recommend? Just start with a decent radio and a tiny sa then play with making rf filters and such. I understand most of the math but until now it's all been theory based and taking notes and I've accumulated enough quality components to actually advertise them locally because there is no walk in shop for parts in my province of nova scotia haha. I'm hoping to be the source of parts for the engineering programs in the new college that is about to open. Anyway, that's beside the point haha.
I have all sorts of different types of enameled copper wire but I've always been hesitant to purchase crystals, toroids and variable capacitors. I guess I have to get to reading and take it slow. Rf has always seemed like the dark arts of medieval wizardry to me haha.
Thanks for the reply and great content!
Personally I would hold off on buying the Siglent until you've got stuck into some RF construction. A Tiny SA will help but so will an SDRPlay RSP1 plus computer. It costs about £100 UK and will enable you to see (and hear) the signals you produce. There is even some free SA software for it. Don't get me wrong, the spectrum analyser is brilliant and I wouldn't be without it now but I'd already scratch-built 4 complete SSB transceivers before I got one! As always, your mileage may vary. 73, Nick
@@M0NTVHomebrewing awesome!
Looks great!
Thanks!
Hi Nick, on toroids.info the length of wire needed is given once the calculation is done
Hi Gerard, do you know - I've never even noticed that before!!! Thanks very much. That will save some wire in the future! 73 Nick
where can I buy a T52 toroid and how much do they cost?
Hi! I think you mean a T50-2 toroid. '50' refers to the diameter and '2' is the type of material that it is formed from. You can find them all over the internet with a quick search. But just be careful that you are satisfied that the person selling them to you knows (and cares) what they are. Don't just trust the colour! Personally I use a combination of a few trusted eBay sellers and Club Sales from the GQRP Club. They are not too pricey for this size but costs increase with the size and weight of toroids. Hope this helps. 73 Nick
@@M0NTVHomebrewing Thank you!!!!
@@drstrangelove09 If you are looking for a good source of toroids then on this side of the Pond I would recommend 'Spectrum Communications' - based down the road from me in Dorchester, Dorset. They have an eBay shop too - just search in eBay for 'spectrumcomms' and you should find them. 73 Nick
"mp0" capacitors? do I have that correct?
NP0 - they are more expensive but don't change their capacitance very much when their temperature changes. You can get away without using them but obviously if you do have some then they will be more consistent in their performance. Generally tuned circuits will benefit from NP0 or C0G capacitors but again you can build with regular caps. Don't let it put you off!
@@M0NTVHomebrewing Thank you so much for the answer!!!
video 3 ????????????????
Part 3 will hopefully be out later this week.