[VHFcontesting] Nice VHF amps available reasonably priced.

[Paul Rollinson]

Good morning  all,for saleI will be traveling south on 4/22 so can meet along the rt 95 corridor between  new england and Durham NC. Returning north on Sunday.These are 4 chip Larcan amps delivering up to 1000w on 6/2/222 depending upon whick brick you purchase. Please email me for more details pics etc...$350 each.73Thanks,Paul Rollinson, KE1LIRollinson Associates860-928-5147860-208-8814 Cell/TextPaulrollinson at sbcglobal.net Representing Component Part Manufacturers for over 35 yearsSent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Paul Rollinson <paulrollinson at sbcglobal.net> Date: 1/19/21  3:56 PM  (GMT-05:00) To: Terry Price <terry at directivesystems.com>, NEWSVHF at mailman.qth.net, "vhfcontesting at contesting.com" <VHFcontesting at contesting.com>, VHF at w6yx.stanford.edu Subject: RE: [VHFcontesting] Nice VHF amps available reasonably priced. Hi all,If your looking for 4 chip Larcan bricks to build an amp, or 2, let me know.I have lo-lo(6m), lo-hi(convert to 2m), and hi-hi ( 222).I'm selling them for a friend.Let me know if intested. The more you buy, the better the price.Thanks,Paul Rollinson, KE1LI Rollinson Associates860-928-5147860-208-8814 Cell/TextPaulrollinson at sbcglobal.net Representing Component Part Manufacturers for over 35 yearsSent from my Verizon, Samsung Galaxy smartphone-------- Original message --------From: Terry Price <terry at directivesystems.com> Date: 1/19/21  3:41 PM  (GMT-05:00) To: NEWSVHF at mailman.qth.net, "vhfcontesting at contesting.com" <VHFcontesting at contesting.com>, VHF at w6yx.stanford.edu Subject: [VHFcontesting] Nice VHF amps available reasonably priced. Folks, thought I would pass this along. I've bought several of their HF-6mamps, 2m amps and 70cm amp (these are just the pallets, I add my ownsupport electronics and relays). They work VERY well and the workmanship onthe boards is first class.The HF/VHF units use a pair of MRF300's which are a cheap plastic tabdevice that is about $40 each from Digikey. They require 50V at 10-15A and12v for bias. I've found a device, a TL783 which is a 3 terminal regulatorthat unlike 78XX series which will only take up to 36v on the input,TL783's will take 50V and give up to 700ma output current, more than enoughto run relays and provide 12v bias. These devices only need two resistorsto set the voltage. I build mine with a pot in place of one resistor so Ican adjust the voltage to suit whatever relays I'm using.If you are looking for medium power, 500w class, for these bands, checkthem out. I have no affiliation with them, just a happy customer. Shippingcan take months with the current COVID situation but I've gotten somewithin weeks.https://eb104.ru/karta-sayta/directoryTerry Price - W8ZNDirective Systems and Engineering703-754-3876_______________________________________________VHFcontesting mailing listVHFcontesting at contesting.comhttp://lists.contesting.com/mailman/listinfo/vhfcontesting