[Amps] variable capacitors

[Dave M]

Actually I have never thought of that , I had considered using just half of one , but taking the capacitance across the 2 stators should also drop the min capacitance as well , ....important at 10m in an HF amp ,


......................................................................................................
 
73     VE3DV , Dave



 

> From: mclarson at rcc.com
> To: kg7hf at comcast.net
> Date: Tue, 25 Jan 2011 14:03:35 -0500
> CC: amps at contesting.com
> Subject: Re: [Amps] variable capacitors
> 
> Butterflies are not that bad -- if you do not ground the rotor and use the
> two stators as the two ends of the cap, you have half the min capacitance
> (important at VHF) twice the breakdown voltage, and no poor rotor contact
> issues. --Mike, WV2ZOW
> 
> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of Paul Decker
> Sent: Tuesday, January 25, 2011 1:48 PM
> To: Dave M
> Cc: amps at contesting.com
> Subject: Re: [Amps] variable capacitors
> 
> 
> 
> Thanks Dave, much appreciated, I'll drop him a line. 
> 
> 
> 
> 
> 
> 
> 
> 
> ----- Original Message ----- 
> From: "Dave M" <slash_dot at msn.com> 
> To: kg7hf at comcast.net, amps at contesting.com 
> Sent: Tuesday, January 25, 2011 12:53:09 PM 
> Subject: RE: [Amps] variable capacitors 
> 
> Paul , I just called Bob at Monarch scince his website is down , he says you
> can contact him directly by email and he is sure he can help you out he has
> the facilities to make pretty much what ever you need , I have been asking
> for about a yr if he has moved to ordinary air variables but he thinks there
> wouldnt be much call for them , if a few of us ask he will start producing
> something a little less expensive than what is available from the mainstream
> scources but until then he has a fair offering of butterflies 
>   
> 
> Leschyna at gmail.com is his email address 
>   
>   
>   
> 
> ............................................................................
> .......................... 
> 
> 73     VE3DV , Dave 
> 
> 
> 
>   
> > Date: Tue, 25 Jan 2011 15:10:24 +0000 
> > From: kg7hf at comcast.net 
> > To: amps at contesting.com 
> > Subject: Re: [Amps] variable capacitors 
> > 
> > 
> > 
> > 
> > 
> > WOW, way more than I budgeted for this project. 
> > 
> > 
> > 
> > 160-205-1 
> > 
> > Qty:       1 to 24 units, $68.63 each plus a $250.00 setup charge 
> > 
> > Qty:       25 to 99 units, $68.63 each no setup charge required 
> > 
> > Qty:       100 units and above, $67.26 each 
> > 
> > 
> > 
> > 160-208-1 
> > 
> > Qty:       1 to 24 units, $70.56 each plus a $250.00 setup charge 
> > 
> > Qty:       25 to 99 units, $70.56 each no setup charge required 
> > 
> > Qty:       100 units and above, $69.15 each 
> > 
> > 
> > 
> > Delivery:              6 weeks or sooner 
> > 
> > FOB:                      Lindenhurst, New York 
> > 
> > Terms:                  Visa, MasterCard, American Express, and wire
> transfer accepted (add $24.00 wire transfer fee to order) 
> > 
> > 
> > 
> > 
> > 
> > David C. Kjeldsen 
> > 
> > Viking Technologies 
> > 
> > (formerly Cardwell Condenser Corporation) 
> > 
> > A member of the Viking Solutions Group, Ltd. 
> > 
> > 80 East Montauk Highway 
> > 
> > Lindenhurst, New York 11757 
> > 
> > Telephone: 631-957-8000 
> > 
> > Facsimile: 631-957-7203 
> > 
> > www.cardwellcondenser.com 
> > 
> > 
> > 
> > 
> > 
> > 
> > ----- Original Message ----- 
> > From: "Paul Decker" <kg7hf at comcast.net> 
> > To: amps at contesting.com 
> > Sent: Monday, January 24, 2011 11:47:55 PM 
> > Subject: variable capacitors 
> > 
> > 
> > 
> > 
> > Hi gang, 
> > 
> > 
> > 
> > I'm trying to track down some possible substitutes for some cardwell. 
> > 
> > 
> > 
> > I need something along the lines of the 160-205 and 160-208 caps. 
> > 
> > http://www.cardwellcondenser.com/PAGES/jcsp02.html 
> > 
> > 
> > 
> > Any ideas on sources or substitutes? 
> > 
> > 
> > 
> > Thanks & 73, 
> > 
> > Paul, kg7hf 
> > _______________________________________________ 
> > Amps mailing list 
> > Amps at contesting.com 
> > http://lists.contesting.com/mailman/listinfo/amps 
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