Re: [Elecraft] Boost power supplies for RF amps

On 2/20/17 at 5:35 PM, jackbrin...@me.com (Jack Brindle) wrote: To be fair, we have had one instance of the problem, and that station was running the battery critically low. In fact the battery failed at that voltage (something like 10 volts) and had to be permanently removed from service.

Re: [Elecraft] Boost power supplies for RF amps

On 2/20/2017 3:11 PM, Matthew Cook wrote: > I believe we will see a return of the 50V MOSFET PA's in commercial > equipment again, especially with the explosion of LDMOS devices and the > ever decreasing availability of 16-18V bi-polar RF transistors. Modern commercial communication sites have

Re: [Elecraft] Boost power supplies for RF amps

At my home station I run my transmitters on a "boosted" 14+ V bus using a TG Electronics Boost Regulator - and "the knobs" at about "3 o'clock". The station battery can go as low as 11.5 V but the 14V bus stays there. On 2/20/2017 3:56 PM, Ron D'Eau Claire wrote: > For the rigs running off of 12

Re: [Elecraft] Boost power supplies for RF amps

Bill; To be fair, we have had one instance of the problem, and that station was running the battery critically low. In fact the battery failed at that voltage (something like 10 volts) and had to be permanently removed from service. Perhaps the answer is to take the battery manufacturer’s

Re: [Elecraft] Boost power supplies for RF amps

I'm trying to reconcile this advice with our experience running QRP field day. We frequently have two or 3 K3s on a single band (CW, SSB, Digital/GOTA). We use batteries and solar cells since our site does not permit generators. When the radios are being fed from a charged battery or a battery

Re: [Elecraft] Boost power supplies for RF amps

, February 20, 2017 5:56 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Boost power supplies for RF amps For the rigs running off of 12 (13.8) Vdc, how about simply not running the rig "all knobs full right"? Reducing the power by 25% will improve IMD performance at lower vol

Re: [Elecraft] Boost power supplies for RF amps

For the rigs running off of 12 (13.8) Vdc, how about simply not running the rig "all knobs full right"? Reducing the power by 25% will improve IMD performance at lower voltages, yet that power difference is virtually impossible to detect on the H.F. bands. 73, Ron AC7AC

Re: [Elecraft] Boost power supplies for RF amps

From: Bill Frantz <fra...@pwpconsult.com> > To: elecraft@mailman.qth.net > Sent: Monday, February 20, 2017 2:08 PM > Subject: [Elecraft] Boost power supplies for RF amps > > The short answer is they can. It is only a matter of engineering > time, cost, resulting price, number of

Re: [Elecraft] Boost power supplies for RF amps

I believe the new Anan-8000DLE does exactly this, and steps up the voltage to 50V. No idea if there's any noise related to these boost converters. Seems like a neat idea, just not sure how it will work in practice. On Mon, Feb 20, 2017 at 4:08 PM, Bill Frantz wrote: > The

Re: [Elecraft] Boost power supplies for RF amps

fra...@pwpconsult.com> To: elecraft@mailman.qth.net Sent: Monday, February 20, 2017 2:08 PM Subject: [Elecraft] Boost power supplies for RF amps The short answer is they can. It is only a matter of engineering time, cost, resulting price, number of customers and competing projects. In other

[Elecraft] Boost power supplies for RF amps

The short answer is they can. It is only a matter of engineering time, cost, resulting price, number of customers and competing projects. In other words, the usual business considerations. Lets work the idea through for several of the Elecraft RF amplifiers: The 10-15W K3(s) amp: This amp can