Thanks Pete. Anything new to report on the MW receiver?

Pete KE9OA wrote:

According to
http://www.geocities.co.jp/SiliconVa...v-di.htm#mixer
the 1SS135 appears to be a VHF/UHF switching diode, from Rohm
Semiconductors. It could be a good diode, but I know that the 5711 is
intended for mixer/detector service. I was unable to find a data sheet for
the 135, so I can't make direct comparisons. I have used the 5711 over the
past several years, with good results. Awhile back, I picked up a batch of
matched quad sets of these diodes from the Rockwell-Collins Inventory
Disposal store for around a dollar a pound. Too bad I got rid of most of
them.........................I thought I would be living out there for
longer than I did. Easy to take things for granted, when they are plentiful.
Fortunately, these things are currently available, and they aren't too
expensive.

Pete

"starman" wrote in message
...
Pete KE9OA wrote:

As far as the 2nd mixer, it is good to get rid of those general
purpose switching diodes and replace them; the 1N5711 Hot Carrier diodes
have lower loss, better IM characteristics, and they are designed for RF
applications.

Is the 1N5711 a good substitute for the 1SS135?

I wish there was.....................it seems that there is always a project
ahead of mine at work. They do want to market the radio, but the software
folks are tied up in more lucrative projects. A friend of mine offered to
write the 145170 PIC code for me last Christmas.............I should have
let him do it. Originally, I just wanted to market a barebones synthesized
radio, but the boss wanted to have a spectrum analyzer display, bass and
treble controls, electronic volume, memories, automatic tracking of the
loopstick antenna...........etc. At Motorola, we used to call this "creeping
elegance". The radio is done............all we need is the uP
(arrrggggggggghhhhhhhhhh) control section to be completed.
I built myself a home version of this unit that has no sync detection, no
synthesizer, and manual tuning of the loopstick. I tune the VCO with a
Spectrol 10-turn pot, and after the first 5 minutes with about a 10kHz
drift, it stays tuned all night.
Right now, the radio sits up on my shelf along with some of my other
homebrew radios.
If this thing ever gets to market, I think you will have quite a bit of fun
with it. When I get my website up again, I will post some pictures of the
prototypes up there.

Pete

"starman" wrote in message
...
Thanks Pete. Anything new to report on the MW receiver?

"Pete KE9OA" wrote in message
...
I wish there was.....................it seems that there is always a
project ahead of mine at work. They do want to market the radio, but the
software folks are tied up in more lucrative projects. A friend of mine
offered to write the 145170 PIC code for me last Christmas.............I
should have let him do it. Originally, I just wanted to market a barebones
synthesized radio, but the boss wanted to have a spectrum analyzer display,
bass and treble controls, electronic volume, memories, automatic tracking
of the loopstick antenna...........etc. At Motorola, we used to call this
"creeping elegance". The radio is done............all we need is the uP
(arrrggggggggghhhhhhhhhh) control section to be completed.
I built myself a home version of this unit that has no sync detection, no
synthesizer, and manual tuning of the loopstick. I tune the VCO with a
Spectrol 10-turn pot, and after the first 5 minutes with about a 10kHz
drift, it stays tuned all night.
Right now, the radio sits up on my shelf along with some of my other
homebrew radios.
If this thing ever gets to market, I think you will have quite a bit of
fun with it. When I get my website up again, I will post some pictures of
the prototypes up there.

Pete

"starman" wrote in message
...
Thanks Pete. Anything new to report on the MW receiver?




Hi Pete

What I should buy, Caig's Pro Gold or Deoxit 5? I want to clean pots,
switches, etc. They seem to be similar. Any particular cheap vendor you buy
from on the net? Don't know if they sell this stuff locally.

Thanks
Lucky

Wayyyy back in the olden days,when Shortwave Radio was aborning.It
wasen't like they could step over to the nearest handy dandy radio store
and buy a factory made shortwave radio,, No Sir! They had to round up
some parts and or buy some kind of a kit thingy and build their own
Shortwave Radio.
cuhulin

"Pete KE9OA" wrote:

At Motorola, we used to call this "creeping
elegance".

Oh, you worked for the Dark Side at Bat Wing Central, huh?

I've always called that "creeping featureism."

--
Eric F. Richards

"Nature abhors a vacuum tube." -- Myron Glass,
often attributed to J. R. Pierce, Bell Labs, c. 1940

Pete,

I hope you make it to production with the MW receiver. It sounds like a
real winner, especially if it gets all the bells and whistles. In the
meantime is there any chance for offering the sync' detector as an
outboard unit which could be added to a car radio? If not, are you free
to release the schematic for homebrew projects?

Thanks

Pete KE9OA wrote:

I wish there was.....................it seems that there is always a project
ahead of mine at work. They do want to market the radio, but the software
folks are tied up in more lucrative projects. A friend of mine offered to
write the 145170 PIC code for me last Christmas.............I should have
let him do it. Originally, I just wanted to market a barebones synthesized
radio, but the boss wanted to have a spectrum analyzer display, bass and
treble controls, electronic volume, memories, automatic tracking of the
loopstick antenna...........etc. At Motorola, we used to call this "creeping
elegance". The radio is done............all we need is the uP
(arrrggggggggghhhhhhhhhh) control section to be completed.
I built myself a home version of this unit that has no sync detection, no
synthesizer, and manual tuning of the loopstick. I tune the VCO with a
Spectrol 10-turn pot, and after the first 5 minutes with about a 10kHz
drift, it stays tuned all night.
Right now, the radio sits up on my shelf along with some of my other
homebrew radios.
If this thing ever gets to market, I think you will have quite a bit of fun
with it. When I get my website up again, I will post some pictures of the
prototypes up there.

Pete

"starman" wrote in message
...
Thanks Pete. Anything new to report on the MW receiver?


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I would probably get it mail order from a company such as Techni-Tool.
Either one is ok, but I like Pro Gold...........about 17 dollars a can, but
one can lasts a long time.

Pete

"Lucky" wrote in message
...

"Pete KE9OA" wrote in message
...
I wish there was.....................it seems that there is always a
project ahead of mine at work. They do want to market the radio, but the
software folks are tied up in more lucrative projects. A friend of mine
offered to write the 145170 PIC code for me last Christmas.............I
should have let him do it. Originally, I just wanted to market a barebones
synthesized radio, but the boss wanted to have a spectrum analyzer
display, bass and treble controls, electronic volume, memories, automatic
tracking of the loopstick antenna...........etc. At Motorola, we used to
call this "creeping elegance". The radio is done............all we need is
the uP (arrrggggggggghhhhhhhhhh) control section to be completed.
I built myself a home version of this unit that has no sync detection, no
synthesizer, and manual tuning of the loopstick. I tune the VCO with a
Spectrol 10-turn pot, and after the first 5 minutes with about a 10kHz
drift, it stays tuned all night.
Right now, the radio sits up on my shelf along with some of my other
homebrew radios.
If this thing ever gets to market, I think you will have quite a bit of
fun with it. When I get my website up again, I will post some pictures of
the prototypes up there.

Pete

"starman" wrote in message
...
Thanks Pete. Anything new to report on the MW receiver?




Hi Pete

What I should buy, Caig's Pro Gold or Deoxit 5? I want to clean pots,
switches, etc. They seem to be similar. Any particular cheap vendor you
buy from on the net? Don't know if they sell this stuff locally.

Thanks
Lucky

Pete KE9OA wrote:

I would probably get it mail order from a company such as Techni-Tool.
Either one is ok, but I like Pro Gold...........about 17 dollars a can, but
one can lasts a long time.

I thought I saw someplace or another that Radio Shack was carrying Caig
products?

dxAce
Michigan
USA

Hi Eric,
I was with them for a couple of years, once we moved back to
Chicago. Most of the work was in spread spectrum communications. It was fun
work. Isn't it funny, how a project grows like that? I used to kid some of
the folks when this would happen, and tell them "it looks as if the monster
is growing many more sets of horns".

Pete

"Eric F. Richards" wrote in message
...
"Pete KE9OA" wrote:

At Motorola, we used to call this "creeping
elegance".

Oh, you worked for the Dark Side at Bat Wing Central, huh?

I've always called that "creeping featureism."

--
Eric F. Richards

"Nature abhors a vacuum tube." -- Myron Glass,
often attributed to J. R. Pierce, Bell Labs, c. 1940