Loading ...
Sorry, an error occurred while loading the content.

43644Re: PA Kits for the Softrock V6.3 RXTX

Expand Messages
  • n4fbz
    May 3 8:48 AM
      Well, as I remember (I'd have to take the softrock apart and check things), I used the T37-6 (10 meter) core, and wound it bifilar. That was in place of the bandpass filter. I don't remember exactly what I came up in place of the transmit section, but I did match things up.

      You see, last month my shop burned- and I lost all of my notes and test equipment I'd collected over the last 25 years, and parts (no insurance, total loss, and all of my friends consider the fire suspicious- I'm not popular in this area). I'd had all of the notes regarding the softrock out there where I'd built it, including research and calculations.




      --- In softrock40@yahoogroups.com, Sid Boyce <sboyce@...> wrote:
      >
      > On 02/05/10 18:59, n4fbz wrote:
      > >
      > >
      > > I modified my softrock so that it has a broadband balun for both tx and
      > > rx, and I'm working on an external amp (using the kit from Kits and
      > > Parts http://www.kitsandparts.com/linearamp.php
      > > <http://www.kitsandparts.com/linearamp.php>) that takes the output from
      > > the mixers, puts the signal through a bandpass filter (built into the
      > > amp box), and then outputs the signal (through more filtering).
      > >
      > Details of the balun? I tested a small BN-43-2402 (or similar) with 8 or
      > 10 bifilar turns between the SR v6.3 and the antenna. It seemed OK, then
      > I tried without it, but with the SO239 isolated from the chassis. Purely
      > empirical the whole exercise, no difference observed.
      >
      > > I also incorporated a receive preamp in the circuit that should
      > > eliminate a lot of the rx problems I've heard about (but only experience
      > > to a small amount). The goal? Have a QRP rig that out performs and is
      > > cleaner than anything available through the "market"- and I think that
      > > might end up being the case!
      > >
      > > The whole idea was to build a modular system. Seperate softrock that can
      > > be used (plugged in) to many different setups and circuits. External
      > > filtering as needed. External amp as well. I can also by switching
      > > cables use my softrock as an IF receiver, or as the basis of a nice
      > > transverter-style 2m SSB system... or for any number of applications.
      > >
      > > BTW- The softrock was built into a nice rf-tight case with feedthroughs
      > > and very strong isolation of any noise source, as well as proper
      > > audio-type grounding (single point). That makes it an awesome receiver
      > > even without the impedance-matching preamp, and I'm looking forward to
      > > seeing how it works on transmit!
      > >
      > Good practice for any radio gear and with digital circuits in close
      > proximity I tend to use lots of ferrite on external leads also. On the
      > SRv6.3 + E-MU 0404 USB with 2m of very heavy figure-of-8 audio cables, I
      > have 3 rather large ferrite rings.
      >
      > > (I just wish that they'd port Rocky to Linux, and add SSB capacity to
      > > the software!)
      > >
      > You stand as much chance of having Rocky ported as you have of being
      > struck by lightning down a coal mine. Flex promised way back to port
      > PowerSDR to Linux, but since have been silent whenever the topic is raised.
      >
      > > Bob
      > > N4FBZ
      > >
      > 73 ... Sid.
      >
      > > --- In softrock40@yahoogroups.com <mailto:softrock40%40yahoogroups.com>,
      > > Preston Douglas <pdouglas12@> wrote:
      > >>
      > >>
      > >> Chris,
      > >>
      > >> I have the Packer Amp with my RXTX 6.3. Per alternate instructions,
      > > changed the input attenuator to 1dB, and I get 15-20 watts out LINEAR
      > > from about 500 mW input from the RXTX. Really gets out well.
      > >>
      > >>
      > >>
      > >>
      > >>
      > >> Preston Douglas WJ2V
      > >>
      > >>
      > >>
      > >> -----Original Message-----
      > >> From: Chris Morin <gtppilot20@>
      > >> To: softrock40@yahoogroups.com <mailto:softrock40%40yahoogroups.com>
      > >> Sent: Sat, May 1, 2010 2:08 pm
      > >> Subject: [softrock40] Re: PA Kits for the Softrock V6.3 RXTX
      > >>
      > >>
      > >>
      > >>
      > >>
      > >>
      > >>
      > >> WOW. Very cool. I have just started making contacts with my 6.3 as
      > > well. Sans amp unfortunately.
      > >> Thanks for the HF Projects mention. Exactly what I have been looking
      > > for !!! Nice !!!
      > >> Assuming things keep going well with the 6.3 I may go for the
      > > Superpacker Pro as a project for next winter.
      > >> QRP is not really my cup of tea, but I do love operating my softrock.
      > >>
      > >> >I finally have the Softrock V6.3 RXTX on the air. I am using the
      > > PowerSDR V1.19.3.15 software and added >a small 12Vdc relay to kill the
      > > transmitted audio that gets into the speaker with an annonying delay.
      > >> >My setup uses the Soundblaster Live 24bit USB for receive and the
      > > laptop sound card for transmit audio.
      > >>
      > >> >I have build the 5W RF amp from Virgil at HF Projects and have been
      > > having fun making contacts on >80/40M.
      > >>
      > >>
      > >> >Thanks Steve N9HE
      > >>
      > >
      >
      >
      > --
      > Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
      > Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
      > Specialist, Cricket Coach
      > Microsoft Windows Free Zone - Linux used for all Computing Tasks
      >
    • Show all 14 messages in this topic