Variable Capacitor Butterfly Style Plates Great for a Home Brew Magnetic Loop
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- Опубліковано 5 жов 2024
- Hi, I am Bob VE3UK from Pyramid Machinery which is the parent company of MagLoop and Monarch Capacitors. Today I am giving a brief introduction on how you can easily make your own butterfly style variable capacitors using the plates the I produce using CNC Laser technology. To get an idea of how many plates you may need for a given required capacitance maximum, please visit my Monarch Capacitor Site's calculator here: www.monarchcapa...
It is better to apply brass materials. Higher cost ofcourse and more consistent ESR and also lower ESR. Good share, buddy
Mark, your post is much appreciated and thank you for your support. 73 Bob
Hi Gareth, as of this moment all that I have been supplying have been "custom" orders as everyone seems to have different requirements. Large loop, small loop, QRP, QRO and all these factors change what the capacitors values need to be. However, I see a need to standardize a kit perhaps a 10 through 120 pF capable of 5KV or 100 Watts or so. Thank you for your interest. Bob
Wow link still a no go. how much are the plates?
Obviously this is excellent workmanship, but since charges accumulate on pointed and sharp ends, I would have rounded off all points and corners and edges, Not only it would stand higher voltages but it would have less stress mechanically at those corners where the holes for the bolts are placed in the fixed and rotary vanes, If as I an conclude those vanes were cut with a Cad operated milling machine, it would be easy to round off the corner. The edges may take a llitle longer. Excellent work nevertheless.
I am glad you enjoyed it, thank you.
Dan, thank you very much for your comment, it means a lot to me. 73 Bob VE3UK
have you ever applied a dielectric coating "from paint to a heat shrink able plastic" to the plates to boost a variable air dielectric caps high voltage rating.
The minimum capacitance will be directly related to the number of plates used. So say for a 100pF max, you are looking at roughly a 10pF minimum. I hope that helps. I have a calculator that I reference in my description above that may help you as well. Thank you. Bob
cant get onto your website for prices
Kind of difficult to buy these when site is not working ?
Link is now dead
What is the benefit of this butterfly style over a half disc shape style ?
A design with 3 or even 4 fixing points on one plate would be much more straight an stable by nature !
ever make general-radio-company's butterfly resonator for any projects?
Hi Ricardo, thank you for your kind words. I have replied to your email. Looking forward to serving you. Keep in touch, 73 Bob VE3UK
What does achieving minimum capacity depend on?
Great video!
hi broken link to the website
Web link wrong?
Thanks for great video and great service to Hams!
73 Dan VA3MA
That is NOT 7/16". All this time watching, learning "how to" yet I have no paycheck for my time I gave you, and you still have my precision machined, huge ass variable cap plates (very close tolerance) that will handle lots of power when I key up.
Hi.
If one wanted to position the plates much closer together, could you use some plastic film between the conductive plates to prevent them from shorting.
Would the plastic film affect the integrity or general function of the variable capacitor in any way ?
>
i have used clear coat spray paint with success on variable caps that arced in their lifetime, the application was in a 1kw lineer amplifier Plate cap, sanded the culprit down, assembled and sprayed the lot, never looked back since.
Amigo parabéns, preciso fazer 5 capacitores mais de 0,0393701 polegadas para 150w , o senhor teria? obrigado!
La direccion de la calculadora de las placas para los variables no funciona
Hi buddy the link dose not work where can I se the pricing fore the capacitors and do you ship to Serbia. 73s
www.monarchcapacitors.com/
Monarch Capacitors is having a facelift, and will be back shortly.
In the mean time to purchase capacitors and parts call Bob (248) 247-5937
Thanks buddy the original link is showing 404
Great video. It appears you do very nice work, too! Will be contacting you.
72 from area code 248!
bueno el vídeo pero fuera bueno verlo funcionar
what is the maximum and minimum capacitance?
we can make the don smith coil high voltage capacitor ?
please sent me replay how to ??
I will be running a fresh batch of 5" plates... If you are interested in some let me know. I am good in QRZ. 73 Bob VE3UK
Congratulations! where buy the spacers?
www.monarchcapacitors.com/
Monarch Capacitors is having a facelift, and will be back shortly.
In the mean time to purchase capacitors and parts call Bob (248) 247-5937
Its two monthjs later and they are still lifting their faces.
Still face lifting, big job!!
Home Depot Seels this I think. Odd, I thought.
Hello Bob. Just checking in. I'm in a better space now and can do 3D printing in at least two different materials. I'd be interested in getting some plates to model up an assembly. I'm on your Magloop email list. 73 K4RJJ
Mr. Leschyna, I've tried to contact you via email from your website but I seems not to be working. May I have it so I can contact you in for a quotation on a kit of your variable capacitors? I thank you in advance. 73 de P43RC Raul G. Croes
isn't the bolt susceptible to rust?
It is aluminum... However, if this was to be used outdoors, you would want to incase it in a weather proof box.
Hi there Bob.
Nice video keep up the good work.
Please get in touch with me as I am interested in building from kit form from you.
73's
Gareth
2E0GGO.
Nice video, ay..?
almost 4 years for a face lift..................I would find some one else to do the what ever.
ditto, 404 not found on this server.
www.monarchcapacitors.com/
Monarch Capacitors is having a facelift, and will be back shortly.
In the mean time to purchase capacitors and parts call Bob (248) 247-5937
Please mail order.
PortableQRP for a radio tuning circuit why use such a large Variable Capacitor?
Virtualgod2009 o wow that is cool, I thought about building a huge tesla coil but that will be for another project. My induction heater works real well now, ever since I put about 4 capacitors on my induction heater it does not kill the mosfets.
Virtualgod2009 when I get more advanced, at what point will I have to use an IGBT?
Yes induction heater. So that tells me that people that are melting thick steel with these high power induction heaters has to use IGBT.
Virtualgod2009 since IGBTs can handle a lot more voltage, then that tells me It would be a lot harder to blow an IGBT, that means I would not have to use mosfets for my induction heating anymore.
Ok I understand.
Just called him. magloop.com is the new site upcoming.
Break 19 how ' bout a radio check?