Thanks for the link, they look like what I'm looking for and the price is right.

Eric, KE6US also gave me a part number with Mouser for a similar part, a single coil model.

At 10:30 AM 10/26/2005, you wrote:

Hi, Cecil. Thanks for the message.

The latching relays I used are NAIS TQ2-L2-5V. If you look closely
at the picture I posted in the files section, you can actually read
the part number. These are in a 10 pin DIP package. I took a 20 pin
dip socket and carefully cut it in half to make 2 10-pin sockets.
This particular relay is DPDT, and has two seperate coil windings.
Pulsing one coil sets the relay in one position, and pulsing the
other coil resets it to the other.

I obtained ten of these from eBay some time ago, but a Google search
reveals that Newark has them at $2.73 each in small quantities. They
may also be available elsewhere. Here's the link to the Newark page:



These are true latching relays. all you need do is provide a pulse
of 5volts to the coil to trigger them, then they stay in the state
they were set to. I used an FET to control them. The FET only
conducts briefly when the band switch is moved. Then the FET turns
off, so no relay coil current flows after that.

The entire multiband SoftRock only consumes 16mA steady-state.

GL es 73,
Bruce N1RX

Cecil Bayona
KD5NWA
www.qrpradio.com

I fail to see why doing the same thing over and over and getting the same results every time is insanity: I've almost proved it isn't; only a few more tests now and I'm sure results will differ this time ...

I have no idea what Bruce used, but I've used the
Omron G6HU-2 series DPDT latching relay for several RF
projects. It is used in the KAT1 ATU for the K1.
Mouser P/N is 653-G6HU-2-DC5 or -DC12 depending on
voltage. Cost is around $3.

Eric
KE6US
www.ke6us.com

--- KD5NWA <KD5NWA@...> wrote:

Where did you get the latching relays, and what are
their numbers. I
have several projects that could use latching
relays. Hopefully they
are affordable, the ones I have found are very
pricey ( > $10) Are
they true mechanical latching relays, that will keep
the settings
with no power?

At 09:50 AM 10/26/2005, you wrote:

Hi, Alex.

Thanks for your comments. Since the next generation

of SoftRock

currently in development will require the physical

swapping of band

modules, having per-band profiles in Rocky would

really be a big

help right now. Also, I have shipped out over 160

40.500Mhz crystals

so far to allow 30m operation with the SoftRock V4

and earlier. I'm

pretty sure that there must be more than just Chuck

(W5USJ) and

myself who have gone multiband by now. PC interface

of the hardware

band switching could naturally follow later

(SoftRock V6.0?)

Thanks for all your great work on the software end.

Without people

like you, Phil Covington and Bill Tracey this stuff

would never be

as popular as it has become.

73,

Bruce N1RX

--- In softrock40@..., "Alex, VE3NEA"

<alshovk@d...>

wrote:

Hi Bruce,

Great work! It should not be too difficult to

add per-band

profiles to

Rocky.

The next logical step is to switch bands

electronically from the

PC, e.g.

with this single-chip USB-to-parallel converter:


73 Alex VE3NEA

As I previosuly reported, I have been working

on a multiband

SoftRock. I finished it up last night, and I

am happy to report

it

works great.

Yahoo! Groups Links

Cecil Bayona
KD5NWA
www.qrpradio.com

I fail to see why doing the same thing over and over
and getting the
same results every time is insanity: I've almost
proved it isn't;
only a few more tests now and I'm sure results will
differ this time ...




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Hi, Cecil. Thanks for the message.

The latching relays I used are NAIS TQ2-L2-5V. If you look closely
at the picture I posted in the files section, you can actually read
the part number. These are in a 10 pin DIP package. I took a 20 pin
dip socket and carefully cut it in half to make 2 10-pin sockets.
This particular relay is DPDT, and has two seperate coil windings.
Pulsing one coil sets the relay in one position, and pulsing the
other coil resets it to the other.

I obtained ten of these from eBay some time ago, but a Google search
reveals that Newark has them at $2.73 each in small quantities. They
may also be available elsewhere. Here's the link to the Newark page:



These are true latching relays. all you need do is provide a pulse
of 5volts to the coil to trigger them, then they stay in the state
they were set to. I used an FET to control them. The FET only
conducts briefly when the band switch is moved. Then the FET turns
off, so no relay coil current flows after that.

The entire multiband SoftRock only consumes 16mA steady-state.

GL es 73,
Bruce N1RX

I sure want to express my thanks to Bill Tracey, Phil Covington and Alex for making the SoftRock project what it has become. The hardware represents a very small part of what is good about this project. I like to say it is 99% or more in the software when it comes to SDR.

Thanks to all who contribute to the software and the success of various SDR projects.

73,
Tony KB9YIG

Where did you get the latching relays, and what are their numbers. I have several projects that could use latching relays. Hopefully they are affordable, the ones I have found are very pricey ( > $10) Are they true mechanical latching relays, that will keep the settings with no power?

At 09:50 AM 10/26/2005, you wrote:

Hi, Alex.

Thanks for your comments. Since the next generation of SoftRock
currently in development will require the physical swapping of band
modules, having per-band profiles in Rocky would really be a big
help right now. Also, I have shipped out over 160 40.500Mhz crystals
so far to allow 30m operation with the SoftRock V4 and earlier. I'm
pretty sure that there must be more than just Chuck (W5USJ) and
myself who have gone multiband by now. PC interface of the hardware
band switching could naturally follow later (SoftRock V6.0?)

Thanks for all your great work on the software end. Without people
like you, Phil Covington and Bill Tracey this stuff would never be
as popular as it has become.

73,

Bruce N1RX

--- In softrock40@..., "Alex, VE3NEA" <alshovk@d...>
wrote:

Hi Bruce,

Great work! It should not be too difficult to add per-band

profiles to

Rocky.

The next logical step is to switch bands electronically from the

PC, e.g.

with this single-chip USB-to-parallel converter:


73 Alex VE3NEA

As I previosuly reported, I have been working on a multiband
SoftRock. I finished it up last night, and I am happy to report

it

works great.

Yahoo! Groups Links

Cecil Bayona
KD5NWA
www.qrpradio.com

I fail to see why doing the same thing over and over and getting the same results every time is insanity: I've almost proved it isn't; only a few more tests now and I'm sure results will differ this time ...

Hi, Alex.

Thanks for your comments. Since the next generation of SoftRock
currently in development will require the physical swapping of band
modules, having per-band profiles in Rocky would really be a big
help right now. Also, I have shipped out over 160 40.500Mhz crystals
so far to allow 30m operation with the SoftRock V4 and earlier. I'm
pretty sure that there must be more than just Chuck (W5USJ) and
myself who have gone multiband by now. PC interface of the hardware
band switching could naturally follow later (SoftRock V6.0?)

Thanks for all your great work on the software end. Without people
like you, Phil Covington and Bill Tracey this stuff would never be
as popular as it has become.

73,

Bruce N1RX

--- In softrock40@..., "Alex, VE3NEA" <alshovk@d...>
wrote:

Hi Bruce,

Great work! It should not be too difficult to add per-band

profiles to

Rocky.

The next logical step is to switch bands electronically from the

PC, e.g.

with this single-chip USB-to-parallel converter:


73 Alex VE3NEA

As I previosuly reported, I have been working on a multiband
SoftRock. I finished it up last night, and I am happy to report

it

works great.

At 10:25 AM 10/26/2005 -0400, you wrote:

Hi Bruce,

Alex,

As a minimum in software and optional in hardware for those with the skills to go the extra mile...[g]

Great work! It should not be too difficult to add per-band profiles to
Rocky.

The next logical step is to switch bands electronically from the PC, e.g.
with this single-chip USB-to-parallel converter:


73 Alex VE3NEA

Chuck Carpenter, W5USJ, Point, TX -|- Rains Co. -|- EM22cv -|- 72 es 73
50 years -|- 19 - K2OFN and 31 - W5USJ -|- Most fun = QRP since 1984.
www.w5usj.com hosted by Hamnutz.com -|- NeTxQRP www.netxqrp.com

Hi Bruce,

Great work! It should not be too difficult to add per-band profiles to Rocky.

The next logical step is to switch bands electronically from the PC, e.g. with this single-chip USB-to-parallel converter:

73 Alex VE3NEA

Hi Bruce,

The I and Q signal integrating caps on the QSD output should be decreased as well as the feedback caps on the two audio amplifiers. I am going to 0.027uF on the signal integrating caps and 220pF on the feedback caps in the v5.0. Your can run version 4.0 as is but will have some gain fall off outside of the present +/- 24 kHz tuning range.

Again, I really like what you have done with the SoftRock!

73,
Tony KB9YIG

No mods needed for 96K sampling, plug and play as they say.

73 - Mike WA8BXN

Tony-

Will any mods to the audio portion of the SoftRock need to be done to
allow 96 Khz sampling? I don't currently have a card that supports
this rate, so I can't try it myself.

-Bruce N1RX

I just added a second photo to the files area with labels. This should
help see what's going on inside the multiband SR.

73, Bruce N1RX

Bruce,

Very, very cool! Maybe with v5.0 you can make it a five band SoftRock
and with a soundcard that can sample at 96kHz the band coverage on
each band will be 96kHz.

This project continues to be a lot of fun!

73,
Tony KB9YIG

Good Morning All,

The parts for the v5.0 prototype build are on the truck for local
delivery this morning with the PCBs due in October 27. Also I was
able to order the 16 missing OPA2228UA opamps from Arror for delivery
also on October. I still need to order a few more parts but should be
able to get the alpha kits mailed out on Monday, October 31.

I do have all the parts needed to build the first v5.0 as soon as I
get the PCBs so I hope to post on Friday morning the initial test
results.

I will send e-mails to the alpha testers to let them know when I have
shipped their kits.

Thanks for your interest in the project.

73,
Tony KB9YIG

I plopped my Multi-band SoftRock onto the scanner bed and obtained a
reasonable quality picture. I have posted it in the Files section
rather than Photos to allow a larger, higher-res version. As you can
see, I managed to shoehorn it into a Mity-Box anodized aluminum
enclosure. I will eventually take some nicer photos and place them in
the N1RX photo folder. Probably won't be until early next week.

-Bruce, N1RX

Hi, gang.

As I previosuly reported, I have been working on a multiband
SoftRock. I finished it up last night, and I am happy to report it
works great.

I used a version 4.0 SoftRock board from AmQRP. I changed c6 and c7
in the oscillator circuit to 33pF to allow use of the 40.5 Mhz
crystals I have. These allow 30M operation on the Ver4.0 SoftRock. I
replaced the original "power conditioner" transistor with a 78L05
voltage regulator. I did not populate the frontend filter/T1
transformer section on the board.

On a piece of perf board, I built two input filter/transformer
cicuits. One is the original design, that passes about 6 to 13 Mhz.
The second BPF/Transformer combo is for good for about 2.8-6.5 Mhz.
I switch in these filters with small latching relays. I came up with
a very simple circuit that trips the relays as a rotary switch is
turned. The latching relays draw no power after they have switched.
There was an extra set of contacts left over on one of the relays. I
sue this to power a dual-color LED.The LED then serves as a power
indicator, and I can tell immediately which filter is active by the
color.

I used a miniature 2-pole 5-position switch I had in my junk box.
The same rotary switch connects one of four crystals to the SoftRock
local oscillator. A fifth position on the switch selects no crystal,
for use with an external VFO. Currently, the crystals I have in the
rig, and the tuning range they provide are:

14.3181 / 3.55-3.60 Mhz
15.750 / 3.914-3.962 Mhz
28.224 / 7.032-7.080 Mhz
40.500 / 10.101-10.149 Mhz

The most amazing thing (to me) is that I managed to fit the whole
thing into a "Mity-Box" enclosure, meant for a Small Wonder Labs
Rock-Mite. It just so happens that the mounting holes along the long
edge of the Version 4.0 PC board are exactly the same spacing as on
the Rock-Mite board. So I was able to mount the SoftRock board and
my BPF/relay board along side it. To allow space for sockets for the
crystals, they had to mounted on a small daughtercard that lays
horizontally in the enclosure.

No pics right now, as my wife has the digital camera in Bermuda. I
may try to take sme crude pics with a web cam, until I can get the
higher-res ones posted.

Now, all I need is for the Software Gurus to allow for multi-band
operation within the various SoftRock software that is available. A
configurable "band select" button or somesuch would allow for easy
band switching in the software. Sepearte storage of I/Q correction
and center freq for each band would be nice. Since the Ver5 SoftRock
will allow for multiple bands through module swapping, this seems
like a natural addition.

I'll let you all know when I get pics of my new creation posted!

73,

Bruce N1RX

Cheaper than a Happy Meal.

Eric
KE6US
www.ke6us.com

--- James Miller <jimwmiller1@...> wrote:

OPA2228UA ICs are in stock at Arrow Electronics
<>.
At $3.14 per chip the cost is not trivial.

GE and 73,
Jim WA2UMP

__________________________________
Yahoo! Mail - PC Magazine Editors' Choice 2005

开云体育

Yes, very good point, and I agree with it. It's always
a milestone for me when I join a new group and
suddenly someone posts a question that I can answer!
hi.

Eric
KE6US
www.ke6us.com

--- Phil Covington <p.covington@...> wrote:

--- In softrock40@..., EricJ
<eric_ke6us@y...> wrote:
<snip>

But maybe those same pros could remember that many

of

us are way over our heads on this (remember,
automotive writer used to things with gears,

shafts

and fuel injectors) and anticipate that we might

need

a little more info in your initial post.

Anyway, I'm 63, retired, have lots of time at my
disposal, and I'm wide-eyed exploring all the new
technology. Small successes more than make up for
occasional frustrations.

Eric
KE6US
www.ke6us.com

Hi Eric,

Yes are right that all anyone needs to do is ask
here - there are many
people who will immediately help out with a problem.

The main point that I tried to make is that
contributing is much
prefered over complaining. Most of the complaining
is about
documentation, usually. You don't have to be a
software or hardware
expert to write instructions on how to install the
software, solder
the smt parts, etc... So the people who claim that
they have nothing
to contribute because they are not technical experts
or are not
software programmers are wrong... There are plenty
of ways to
contribute... like writing documentation which can
be a simple as
writing up your experiences in installing the
software, etc...

73 de Phil N8VB





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Thanks Tony, paypal sent. And thanks for all your hard work on this
project.