KWZ 30 Kneisner & Doering Receiver
 

eBay item: 170526253934

dxAce
Michigan
USA

KWZ 30 Kneisner & Doering Receiver
 

On Fri, 13 Aug 2010 06:37:25 -0400, dxAce
wrote:

eBay item: 170526253934

dxAce
Michigan
USA

Not the most sensitive receiver but it had excellent digital filters
for its time. Very low distortion and great audio quality.

Guess they gave up on the KWZ-50. Anyone heard anything?

Jim

KWZ 30 Kneisner & Doering Receiver
 

wrote:

On Fri, 13 Aug 2010 06:37:25 -0400, dxAce
wrote:

eBay item: 170526253934

dxAce
Michigan
USA

Not the most sensitive receiver but it had excellent digital filters
for its time. Very low distortion and great audio quality.

Guess they gave up on the KWZ-50. Anyone heard anything?

Last I checked their website they appeared to be out of the receiver biz.

KWZ 30 Kneisner & Doering Receiver
 

I recall reading somewhere that the KWZ-30 had a unique method of
handling AM signal fading. It wasn't synchronous detection but
something else. Does anyone remember what it was?

KWZ 30 Kneisner & Doering Receiver
 

DEFCON 88 wrote:

I recall reading somewhere that the KWZ-30 had a unique method of
handling AM signal fading. It wasn't synchronous detection but
something else. Does anyone remember what it was?

See page 13 here where it mentions the AM demodulator, that may be it:

http://www.mwcircle.org/docs/receivers/kwz30.pdf

KWZ 30 Kneisner & Doering Receiver
 

On Aug 14, 2:12*pm, dxAce wrote:
DEFCON 88 wrote:
I recall reading somewhere that the KWZ-30 had a unique method of
handling AM signal fading. It wasn't synchronous detection but
something else. Does anyone remember what it was?

See page 13 here where it mentions the AM demodulator, that may be it:

http://www.mwcircle.org/docs/receivers/kwz30.pdf


Yes, that's it. Thanks!

KWZ 30 Kneisner & Doering Receiver
 

dxAce wrote:


DEFCON 88 wrote:

I recall reading somewhere that the KWZ-30 had a unique method of
handling AM signal fading. It wasn't synchronous detection but
something else. Does anyone remember what it was?

See page 13 here where it mentions the AM demodulator, that may be it:

http://www.mwcircle.org/docs/receivers/kwz30.pdf



A DSP synchronous detector. The K3 has one.

KWZ 30 Kneisner & Doering Receiver
 

On Aug 14, 4:27*pm, bm wrote:
On 14 Aug, 20:24, DEFCON 88 wrote:

On Aug 14, 2:12*pm, dxAce wrote:

DEFCON 88 wrote:
I recall reading somewhere that the KWZ-30 had a unique method of
handling AM signal fading. It wasn't synchronous detection but
something else. Does anyone remember what it was?

See page 13 here where it mentions the AM demodulator, that may be it:

http://www.mwcircle.org/docs/receivers/kwz30.pdf

Yes, that's it. Thanks!

The KWZ-30's audio quality is the best I've encountered on any HF
receiver. And I've had a few. And their Auto Notch function is second
to none - totally transparent when selected, and with practically no
effect on recovered audio quality.

Bjarne Mjelde
Berlevag, Arctic Norway

Are they still in business? The last time I tried to visit their
website, it was gone!

Steve

KWZ 30 Kneisner & Doering Receiver
 

On Aug 15, 3:25*pm, Steve wrote:
On Aug 14, 4:27*pm, bm wrote:





On 14 Aug, 20:24, DEFCON 88 wrote:

On Aug 14, 2:12*pm, dxAce wrote:

DEFCON 88 wrote:
I recall reading somewhere that the KWZ-30 had a unique method of
handling AM signal fading. It wasn't synchronous detection but
something else. Does anyone remember what it was?

See page 13 here where it mentions the AM demodulator, that may be it:

http://www.mwcircle.org/docs/receivers/kwz30.pdf

Yes, that's it. Thanks!

The KWZ-30's audio quality is the best I've encountered on any HF
receiver. And I've had a few. And their Auto Notch function is second
to none - totally transparent when selected, and with practically no
effect on recovered audio quality.

Bjarne Mjelde
Berlevag, Arctic Norway

Are they still in business? The last time I tried to visit their
website, it was gone!

Steve- Hide quoted text -

- Show quoted text -
The website seems to be out,indeed.

KWZ 30 Kneisner & Doering Receiver
 

On 14 Aug, 20:24, DEFCON wrote:

On Aug 14, 2:12 pm, wrote:

DEFCON 88 wrote:
I recall reading somewhere that the KWZ-30 had a unique method of
handling AM signal fading. It wasn't synchronous detection but
something else. Does anyone remember what it was?

See page 13 here where it mentions the AM demodulator, that may be it:

http://www.mwcircle.org/docs/receivers/kwz30.pdf



That requires a lot of processing power. It would follow that
latency would be high. If you're using WWV as a time standard for
something requiring very high precision, it would require a
correction step.

Still, that's a pretty clever way of doing it.