In article , b wrote:
Thanks for the response. I found that site a few days ago, and was playing
around trying to get that circuit to work, until I noticed that there is no
DC path for collector current for Q1.

Hmm... you're right, that's really creepy. You think maybe base and collector
are swapped here?

I was thinking at first that maybe the base leakage did the trick, which
could be possible if it's a germanium type.

Also, there seems to be an issue with how L1 and L2 and the associated caps
are connected. I moved a few things around and got Q1 to work as an
oscillator and a superregen detector (I think), but have not built up the
audio and the switching circuits yet.
I'm still hoping to find some other examples of these cute little rigs.

I can send you a Lafayette one if I can find it. You're welcome to draw the
schematic out.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Scott,
I don't think the base and collector are swapped as the biasing looks
right as drawn on the presumed base, plus, if so then there would be no path
for base current.
Thanks for the offer of the Lafayette, I'd love to get a look at it.

Bob



"Scott Dorsey" wrote in message
...
In article , b wrote:
Thanks for the response. I found that site a few days ago, and was
playing
around trying to get that circuit to work, until I noticed that there is
no
DC path for collector current for Q1.

Hmm... you're right, that's really creepy. You think maybe base and
collector
are swapped here?

I was thinking at first that maybe the base leakage did the trick, which
could be possible if it's a germanium type.

Also, there seems to be an issue with how L1 and L2 and the associated
caps
are connected. I moved a few things around and got Q1 to work as an
oscillator and a superregen detector (I think), but have not built up the
audio and the switching circuits yet.
I'm still hoping to find some other examples of these cute little rigs.


I can send you a Lafayette one if I can find it. You're welcome to draw
the
schematic out.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

In article , b wrote:
Scott,
I don't think the base and collector are swapped as the biasing looks
right as drawn on the presumed base, plus, if so then there would be no path
for base current.
Thanks for the offer of the Lafayette, I'd love to get a look at it.

Give me an address and I will mail it. Your email in your post is not
valid.

Looking inside it, it looks way higher quality than the Archer. It has two
transformers inside!
--scott

I will say, though, that the RF performance on the Teenage Mutant Ninja
Turtle 49 Mhz walkie-talkie when moved to 6M is much better than on the
Archer Space Cadet walkie-talkie when moved to 10M. Either one is really
fun to write on a QSL card, though.

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

In article , b wrote:
Scott,
I don't think the base and collector are swapped as the biasing looks
right as drawn on the presumed base, plus, if so then there would be no path
for base current.
Thanks for the offer of the Lafayette, I'd love to get a look at it.

No joke. Get me your physical mailing address and I'll send it to you.
But you have to email me your address.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

On Thu, 10 Dec 2009, Scott Dorsey wrote:

In article , b wrote:
Thanks for the response. I found that site a few days ago, and was playing
around trying to get that circuit to work, until I noticed that there is no
DC path for collector current for Q1.

Hmm... you're right, that's really creepy. You think maybe base and collector
are swapped here?

I was thinking at first that maybe the base leakage did the trick, which
could be possible if it's a germanium type.

Also, there seems to be an issue with how L1 and L2 and the associated caps
are connected. I moved a few things around and got Q1 to work as an
oscillator and a superregen detector (I think), but have not built up the
audio and the switching circuits yet.
I'm still hoping to find some other examples of these cute little rigs.

I can send you a Lafayette one if I can find it. You're welcome to draw the
schematic out.

I think you're right, the circuits were so simple that there wasn't much
variation. Any schematic, I suspect they are in the RCA transistor guides
among other places) would make a good start for circuit tracing. You have
an end circuit to visualize and use the actual circuitry to "test" the
schematic, either it's going to match or be close.

Michael VE2BVW