On Mar 25, 9:33 pm, Richard Clark wrote:
On Mon, 24 Mar 2008 15:40:53 -0700 (PDT), Artem
wrote:

This is still a strain in language as you have done nothing to
describe what the "compensation" is for. The circuit of your
schematic is fully differential in a bridge configuration, so saying
it will not amplify still makes no sense. To offer a deliberate

It will not amplify signal in-phase signal. It's same like
differential amplifier.

This still makes no sense. You have not described what you are
"compensating" for, and differential amplifiers amplify without
distinction to "in-phase" or "out-of-phase." If it did, you are not
using the right topology because you are using operational amplifier
terminology - the circuit is not an operational amplifier, even by
discrete components.

They are not shown in your schematic. I don't see them in your
photos. Making them operational is adding yet more lines, although I
can see they would be necessary for your purposes.

http://img245.imageshack.us/my.php?image=d3du5.jpg

Nice close-up. Choking of some of the lines seems OK, but not the
coax.
http://img370.imageshack.us/my.php?image=d2eb0.jpg

Could you find in this picture choke?

So, now where is the schematic of the biasing for these
varicaps? If those two clear insulation lines are going to the loop,

It's lines from resonance loop to amplifier.

it is going to be hard to apply DC to a dead short - or does that
black shroud cover more than the varicaps?

Now my Antenna in broken. I will fix my antenna mad make a web for
schematics, software for calculation? etc.


PS: Could anyone know, What I can receive in QRSS, 7 MHz in Europe on
this
http://www.radiointel.com/review-degende1103.htm
receiver?

On Tue, 25 Mar 2008 13:55:16 -0700 (PDT), Artem
wrote:

Nice close-up. Choking of some of the lines seems OK, but not the
coax.
http://img370.imageshack.us/my.php?image=d2eb0.jpg

Could you find in this picture choke?

What material is used in the ferrite?

So, now where is the schematic of the biasing for these
varicaps? If those two clear insulation lines are going to the loop,

It's lines from resonance loop to amplifier.

Does this mean the varicaps are across the loop?

If so:
it is going to be hard to apply DC to a dead short - or does that
black shroud cover more than the varicaps?

Now my Antenna in broken. I will fix my antenna mad make a web for
schematics, software for calculation? etc.

You've done it by parts already, so, sure.

73's
Richard Clark, KB7QHC

On Mar 26, 12:26 am, Richard Clark wrote:
On Tue, 25 Mar 2008 13:55:16 -0700 (PDT), Artem
wrote:

Nice close-up. Choking of some of the lines seems OK, but not the
coax.
http://img370.imageshack.us/my.php?image=d2eb0.jpg

Could you find in this picture choke?

What material is used in the ferrite?

For transformer - low magnetic permeability (50) for chokes - high.


So, now where is the schematic of the biasing for these
varicaps? If those two clear insulation lines are going to the loop,

It's lines from resonance loop to amplifier.

Does this mean the varicaps are across the loop?

http://img524.imageshack.us/my.php?image=antjy3.jpg

On Wed, 26 Mar 2008 04:15:20 -0700 (PDT), Artem
wrote:

What material is used in the ferrite?

For transformer - low magnetic permeability (50) for chokes - high.

Unless you can be more specific, this sounds like the wrong material
(which you have not specified - do you know what you used?).

73's
Richard Clark, KB7QHC

On Mar 26, 5:40 pm, Richard Clark wrote:
On Wed, 26 Mar 2008 04:15:20 -0700 (PDT), Artem
wrote:

What material is used in the ferrite?

For transformer - low magnetic permeability (50) for chokes - high.

Unless you can be more specific, this sounds like the wrong material
(which you have not specified - do you know what you used?).

I'm use USSR ferrite 50HH.

On Wed, 26 Mar 2008 08:26:52 -0700 (PDT), Artem
wrote:

I'm use USSR ferrite 50HH.

Google reveals all of one page in the entire Web that responds to that
as a search term - and that page refuses to load.

73's
Richard Clark, KB7QHC