Variable Capacitor Butterfly Style Plates Great for a Home Brew Magnetic Loop

[@iblesbosuok]

It is better to apply brass materials. Higher cost ofcourse and more consistent ESR and also lower ESR. Good share, buddy

[@PortableQRP]

Mark, your post is much appreciated and thank you for your support. 73 Bob

[@PortableQRP]

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

[@hillbillyhorticulture8960]

Wow link still a no go. how much are the plates?

[@PortableQRP]

Dan, thank you very much for your comment, it means a lot to me. 73 Bob VE3UK

[@322doug]

Kind of difficult to buy these when site is not working ?

[@carmelpule6954]

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.

[@PortableQRP]

I am glad you enjoyed it, thank you.

[@aridunyasi1274]

What does achieving minimum capacity depend on?

[@dalemyers5096]

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.

[@Dr._Spamy]

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 !

[@jeremycole3008]

ever make general-radio-company's butterfly resonator for any projects?

[@PortableQRP]

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

[@darrenstockton578]

cant get onto your website for prices

[@Bodragon]

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 ? >

[@luckydubeinrc5165]

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.

[@PortableQRP]

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

[@survivalcanada2347]

hi broken link to the website

[@pescadorcisimo]

La direccion de la calculadora de las placas para los variables no funciona

[@daviddavidson1372]

Link is now dead

[@danhoward9847]

Thanks for great video and great service to Hams! 73 Dan VA3MA

[@YU5KBM]

Hi buddy the link dose not work where can I se the pricing fore the capacitors and do you ship to Serbia. 73s

[@ukfr3d]

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 [phone]

[@YU5KBM]

Thanks buddy the original link is showing 404

[@royhopkins974]

Web link wrong?

[@Lindomar850]

Amigo parabéns, preciso fazer 5 capacitores mais de 0,0393701 polegadas para 150w , o senhor teria? obrigado!

[@CARL557511]

Great video!

[@ഇത്കേരളമാണ്ഇവിടെഇങ്ങനാണ്]

we can make the don smith coil high voltage capacitor ? please sent me replay how to ??

[@3butalcomp3]

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.

[@rgcroes100]

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

[@aldrichsarmiento]

Congratulations! where buy the spacers?

[@ukfr3d]

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 [phone]

[@jrfoleyjr]

Its two monthjs later and they are still lifting their faces.

[@chinook3726]

Still face lifting, big job!!

[@3butalcomp3]

Home Depot Seels this I think. Odd, I thought.

[@tubesman7]

what is the maximum and minimum capacitance?

[@BillyBob-si2db]

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

[@CharlesMartel676]

Great video. It appears you do very nice work, too! Will be contacting you. 72 from area code 248!

[@gokulobo]

bueno el vídeo pero fuera bueno verlo funcionar

[@W4TRI_Ronny]

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

[@renekenshin6573]

isn't the bolt susceptible to rust?

[@BillyBob-si2db]

It is aluminum... However, if this was to be used outdoors, you would want to incase it in a weather proof box.

[@garfish307]

Nice video, ay..?

[@tks5138]

Please mail order.

[@sweetguy19762]

PortableQRP for a radio tuning circuit why use such a large Variable Capacitor?

[@sweetguy19762]

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.

[@sweetguy19762]

Virtualgod2009 when I get more advanced, at what point will I have to use an IGBT?

[@sweetguy19762]

Yes induction heater. So that tells me that people that are melting thick steel with these high power induction heaters has to use IGBT.

[@sweetguy19762]

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.

[@sweetguy19762]

Ok I understand.

[@hamradioman222]

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.

[@skippickens1843]

almost 4 years for a face lift..................I would find some one else to do the what ever.

[@dalemyers5096]

ditto, 404 not found on this server.

[@ukfr3d]

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 [phone]

[@W4TRI_Ronny]

Just called him. magloop.com is the new site upcoming.

[@3butalcomp3]

Break 19 how ' bout a radio check?