43632Re: [softrock40] Re: PA Kits for the Softrock V6.3 RXTX
- May 2, 2010On 02/05/10 18:59, n4fbz wrote:
>Details of the balun? I tested a small BN-43-2402 (or similar) with 8 or
> 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).
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 shouldGood practice for any radio gear and with digital circuits in close
> 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!
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 toYou stand as much chance of having Rocky ported as you have of being
> the software!)
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.
> Bob73 ... Sid.
> --- In firstname.lastname@example.org <mailto:softrock40%40yahoogroups.com>,--
> Preston Douglas <pdouglas12@...> wrote:
>> 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: email@example.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 V188.8.131.52 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
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