[amsat-bb] Re: Anybody use a Soft66ADD SDR?
Mark L. Hammond
marklhammond at gmail.com
Wed Feb 10 13:49:17 PST 2010
Thank you for your candid assessment. After looking over the website,
I decided that a kit form wouldn't be a good choice for me (and I love
to build!) So, the assembled unit does look like a good option.
I wish you had some performance reports!
On the other hand, maybe you just gave me one ;)
73 and I hope you get it going.
On Wed, Feb 10, 2010 at 4:24 PM, Robert Liesenfeld <xunil at xunil.net> wrote:
> Hi Mark-
> I'm the friend Owen refers to; I just built a Soft66ADI. I keep meaning to
> do a blog post about it, but I'll summarize here.
> I really liked the form factor of the Soft66; the software-selectable BPFs
> and the fact that the control software is open source really sealed the deal
> for me. I ordered the unassembled kit, with the aluminum enclosure for
> which it was intended.
> The build instructions were baffling in parts, due to being written by a
> native Japanese speaker (JA7TDO, the kit's creator). They're not
> incomprehensible, but he chooses some strange words sometimes. Added to
> this is the fact that the schematic lacks component values, IC labels, and
> occasionally flat-out contradicts the PCB and parts supplied. For instance
> on one of the BPFs, the schematic showed a capacitor, the PCB seemed to call
> for a capacitor (e.g. C23), but the parts list had C23 as an inductor. I
> emailed JA7TDO and asked him about this, he confirmed that the inductor was
> the correct part. The voltage regulator IC was listed as one thing on the
> PCB, and something else entirely on the parts list; if there had been more
> than one device with a similar package this would have been a show-stopper.
> Issues like this lead me to advise against ordering this as a kit. So far I
> have not been able to get mine to work in xlinrad, Rocky, or any other SDR
> software, but this might be due to the lack of a decent receive antenna. If
> improving the antenna doesn't yield results, I'm afraid I'll have to haul
> out the oscilloscope... I dread this because the schematic is worse than
> useless, and requests to the author for advice have so far yielded very
> terse replies, which left me with more questions than answers. Finally,
> there's no indication of test points or any voltages or waveforms I should
> see at certain points, so I'll have to puzzle it all out on my own.
> I really ought to dig out that softrock rxtx kit and finish it... anyway,
> hope this helps.
> Robert AK6L
> On Wed, Feb 10, 2010 at 11:38 AM, Owen B. Mehegan <owen at nerdnetworks.org>wrote:
>> > Message: 17
>> > Date: Wed, 10 Feb 2010 13:35:19 -0500
>> > From: "Mark L. Hammond" <marklhammond at gmail.com>
>> > Subject: [amsat-bb] Anybody use a Soft66ADD SDR?
>> > To: Amsat - BBs <amsat-bb at amsat.org>
>> > Message-ID:
>> > <5d8cecfe1002101035x35f07d7dpc047e54cf120a4aa at mail.gmail.com>
>> > Content-Type: text/plain; charset=ISO-8859-1
>> > Found this today, look interesting. Prices are quite reasonable (if
>> > not cheap). Performance is the question.. I suppose the quality of
>> > the system sound card is a big issue.
>> > Anybody here own one or seen one in use?
>> > How about piping a 10.7 MHz IF into it for VHF/UHF?
>> > http://zao.jp/radio/soft66ad/
>> > --
>> > Mark L. Hammond [N8MH]
>> A friend of mine just bought and assembled one. He said that the
>> were pretty poor... the parts list and schematic didn't always match up and
>> had to do a fair amount of head-scratching (and I think
>> to get it built. He was not impressed with that aspect. I haven't yet heard
>> how well it's working as a radio. I'll ask him and let you know.
>> Owen B. Mehegan (KJ6AKQ)
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> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
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Mark L. Hammond [N8MH]
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