On Jan 24, 10:03*am, sorry-spammers ""w9wi\"@(sorry-spammers)"
wrote:
JIMMIE wrote:
I was wanting to listen to VHF/UHF SSB. All of my present UHF/VHF
radios are FM. I was thinking of rigging up a simple downconverter
using a mini circuit mixer and my HP signal generator as the local
oscilator that I can connect in front of my HF rig. I have an antenna
mounted pre- amp that I think should suffice for my front end. Any
foreseeable problems short of keying my transmitter while it is
connected.

Just as an experiment, I once used the mixer & LO in one of my FM rigs. *Just tapped the output of the mixer just before the IF filter, ran it through
a DC-blocking capacitor out to the antenna input of a general-coverage HF receiver. *Tuned the HF rig to 10.7MHz - sure enough, there were the 2m SSB
(and CW) signals. *Worked pretty well.

It was pretty cumbersome to tune though. *Luckily, almost everyone around here is within 5KHz of 144.200...

Didn't take long to get the urge to transmit, at which point I wimped out & bought a multimode rig...

--

Doug Smith W9WI
Pleasant View, TN *EM66

Thats a thought, I might do that with an old mobile unit I have in the
junk box. I think it will rx but the tx is dead. See if I can pick the
signal off right after the first mixer.

Jimmiej

On Sat, 23 Jan 2010 14:52:14 -0800, JIMMIE wrote:

I was wanting to listen to VHF/UHF SSB. All of my present UHF/VHF radios
are FM. I was thinking of rigging up a simple downconverter using a mini
circuit mixer and my HP signal generator as the local oscilator that I
can connect in front of my HF rig. I have an antenna mounted pre- amp
that I think should suffice for my front end. Any foreseeable problems
short of keying my transmitter while it is connected.

Jimmie

Performance won't be optimal, and you'll get some LO leakage.

You may want to consider trapping the LO back toward the antenna, or
using a preamp just to block the radiation.

Or just lash the dang thing together and see how it works.

--
www.wescottdesign.com

On Sat, 23 Jan 2010 14:52:14 -0800, JIMMIE wrote:

I was wanting to listen to VHF/UHF SSB. All of my present UHF/VHF radios
are FM. I was thinking of rigging up a simple downconverter using a mini
circuit mixer and my HP signal generator as the local oscilator that I
can connect in front of my HF rig. I have an antenna mounted pre- amp
that I think should suffice for my front end. Any foreseeable problems
short of keying my transmitter while it is connected.

Jimmie

Do let us know what you tried, and how it worked.

--
www.wescottdesign.com

On Jan 24, 6:21*pm, Tim Wescott wrote:
On Sat, 23 Jan 2010 14:52:14 -0800, JIMMIE wrote:
I was wanting to listen to VHF/UHF SSB. All of my present UHF/VHF radios
are FM. I was thinking of rigging up a simple downconverter using a mini
circuit mixer and my HP signal generator as the local oscilator that I
can connect in front of my HF rig. I have an antenna mounted pre- amp
that I think should suffice for my front end. Any foreseeable problems
short of keying my transmitter while it is connected.

Jimmie

Do let us know what you tried, and how it worked.

--www.wescottdesign.com

OK where can you get a TUF-1

Jimmie

JIMMIE wrote:
On Jan 24, 6:21 pm, Tim Wescott wrote:
On Sat, 23 Jan 2010 14:52:14 -0800, JIMMIE wrote:
I was wanting to listen to VHF/UHF SSB. All of my present UHF/VHF radios
are FM. I was thinking of rigging up a simple downconverter using a mini
circuit mixer and my HP signal generator as the local oscilator that I
can connect in front of my HF rig. I have an antenna mounted pre- amp
that I think should suffice for my front end. Any foreseeable problems
short of keying my transmitter while it is connected.
Jimmie
Do let us know what you tried, and how it worked.

--www.wescottdesign.com

OK where can you get a TUF-1

Jimmie

Direct from Mini Circuits
http://www.minicircuits.com/cgi-bin/...rch_type=model
or Downeast Microwave in the "components" section
http://www.downeastmicrowave.com/cat-frame.htm

Minicircuits is $7.50 each, Downeast is $18 each. I assume both will
have a shipping charge.

Scott
N0EDV

On Jan 24, 8:47*pm, Scott wrote:
JIMMIE wrote:
On Jan 24, 6:21 pm, Tim Wescott wrote:
On Sat, 23 Jan 2010 14:52:14 -0800, JIMMIE wrote:
I was wanting to listen to VHF/UHF SSB. All of my present UHF/VHF radios
are FM. I was thinking of rigging up a simple downconverter using a mini
circuit mixer and my HP signal generator as the local oscilator that I
can connect in front of my HF rig. I have an antenna mounted pre- amp
that I think should suffice for my front end. Any foreseeable problems
short of keying my transmitter while it is connected.
Jimmie
Do let us know what you tried, and how it worked.

--www.wescottdesign.com

OK where can you get a TUF-1

Jimmie

Direct from Mini Circuitshttp://www.minicircuits.com/cgi-bin/modelsearch?model=TUF-1%2B&search...
or Downeast Microwave in the "components" sectionhttp://www.downeastmicrowave.com/cat-frame.htm

Minicircuits is $7.50 each, Downeast is $18 each. *I assume both will
have a shipping charge.

Scott
N0EDV- Hide quoted text -

- Show quoted text -

Thanks I was under the impression the minicircuits has a minimum
order.

Jimmie

JIMMIE wrote:


Thanks I was under the impression the minicircuits has a minimum
order.

Jimmie

Not that I'm aware of I've ordered small quantities from them in the
past....

On Jan 24, 6:21*pm, Tim Wescott wrote:
On Sat, 23 Jan 2010 14:52:14 -0800, JIMMIE wrote:
I was wanting to listen to VHF/UHF SSB. All of my present UHF/VHF radios
are FM. I was thinking of rigging up a simple downconverter using a mini
circuit mixer and my HP signal generator as the local oscilator that I
can connect in front of my HF rig. I have an antenna mounted pre- amp
that I think should suffice for my front end. Any foreseeable problems
short of keying my transmitter while it is connected.

Jimmie

Do let us know what you tried, and how it worked.

--www.wescottdesign.com

UPS delivered the mixer yesterday evening but I didnt get to play with
it until this AM.Im working evenings. I spent about an hour getting it
connected up. There may not have been any SSB activity but I was able
to hear all the usual local 2m repeaters using my HF rig set up for
10M FM.

Setup was as about as simple as it gets. With pre- amp at the antenna,
antenna , receiver and osc was just connected directly to the mixer
with some small coax alledged to be 50 ohms. At this thime I really
cant evaluate it more than that.

Jimmie

On Fri, 29 Jan 2010 13:07:30 -0800, JIMMIE wrote:

On Jan 24, 6:21Â*pm, Tim Wescott wrote:
On Sat, 23 Jan 2010 14:52:14 -0800, JIMMIE wrote:
I was wanting to listen to VHF/UHF SSB. All of my present UHF/VHF
radios are FM. I was thinking of rigging up a simple downconverter
using a mini circuit mixer and my HP signal generator as the local
oscilator that I can connect in front of my HF rig. I have an antenna
mounted pre- amp that I think should suffice for my front end. Any
foreseeable problems short of keying my transmitter while it is
connected.

Jimmie

Do let us know what you tried, and how it worked.

--www.wescottdesign.com

UPS delivered the mixer yesterday evening but I didnt get to play with
it until this AM.Im working evenings. I spent about an hour getting it
connected up. There may not have been any SSB activity but I was able to
hear all the usual local 2m repeaters using my HF rig set up for 10M FM.

Setup was as about as simple as it gets. With pre- amp at the antenna,
antenna , receiver and osc was just connected directly to the mixer with
some small coax alledged to be 50 ohms. At this thime I really cant
evaluate it more than that.

The bands always go dead right when you finish a radio.

Keep us posted.

--
www.wescottdesign.com

On Jan 29, 9:24*pm, Tim Wescott wrote:
On Fri, 29 Jan 2010 13:07:30 -0800, JIMMIE wrote:
On Jan 24, 6:21*pm, Tim Wescott wrote:
On Sat, 23 Jan 2010 14:52:14 -0800, JIMMIE wrote:
I was wanting to listen to VHF/UHF SSB. All of my present UHF/VHF
radios are FM. I was thinking of rigging up a simple downconverter
using a mini circuit mixer and my HP signal generator as the local
oscilator that I can connect in front of my HF rig. I have an antenna
mounted pre- amp that I think should suffice for my front end. Any
foreseeable problems short of keying my transmitter while it is
connected.

Jimmie

Do let us know what you tried, and how it worked.

--www.wescottdesign.com

UPS delivered the mixer yesterday evening but I didnt get to play with
it until this AM.Im working evenings. I spent about an hour getting it
connected up. There may not have been any SSB activity but I was able to
hear all the usual local 2m repeaters using my HF rig set up for 10M FM..

Setup was as about as simple as it gets. With pre- amp at the antenna,
antenna , receiver and osc was just connected directly to the mixer with
some small coax alleged to be 50 ohms. At this thime I really cant
evaluate it more than that.

The bands always go dead right when you finish a radio.

Keep us posted.

--www.wescottdesign.com

Seems to be overloading a little on strong signals. This is probably
the reason rreal receivers arent quite so simple.

Jimmie