Re: [Elecraft] Re: K1 on USB CW

2004-06-19 Thread VR2BrettGraham
N2EY said: The bigger point, and the reason for all the bandwidth, is that we do ourselves and amateur radio a disservice if we blindly accept such stories without checking out the facts. The difference between high side low side injection is something I'm always having to explain over

Re: [Elecraft] Re: K1 on USB CW

2004-06-18 Thread Bob Nielsen
3) The filter system lent itself easily to transceiver implementations. This greatly reduced size, power consumption, cost and complexity, because the same oscillators could be used for both transmit and receive. Also, the task of zeroing the transmitter was mostly eliminated. (Trivia: what

[Elecraft] Re: K1 on USB CW

2004-06-17 Thread Mike Morrow
Steve WB6RSE wrote: Anyone have any experience changing the K1 from LSB to USB CW? Steve, That's an interesting question. The K1 front end mixer injects the local oscillator (LO) signal ABOVE the incoming RF signal (high side injection), while the product detector injects the BFO signal

Re: [Elecraft] Re: K1 on USB CW

2004-06-17 Thread Steve Lawrence
On Jun 17, 2004, at 10:43 AM, Mike Morrow wrote: I'd be curious about the advantages that you see in a K1 LSB-to-USB conversion. 73, Mike / KK5F Mike - I have no interest in listening to SSB with the K1 and have set it up for an 80 kc spread. The advantage to USB CW is that it has long

Re: [Elecraft] Re: K1 on USB CW

2004-06-17 Thread giuliano
To solve this problem see my SSB mods for K1 and see only the schematic part regarding BFO . Documentation to my web page: http://it.geocities.com/giulianoi0cg/k1_page.html 73 de Giuliano I0CG Steve WB6RSE wrote: Anyone have any experience changing the K1 from LSB to USB CW?

Re: [Elecraft] Re: K1 on USB CW

2004-06-17 Thread N2EY
In a message dated 6/17/04 2:41:52 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: The present day LSB - USB band standards have their roots from years ago in the availability of 9 Mc crystals / filters - when SSB was experimental and you had to build your own. 9 Mc plus a VFO

Re: [Elecraft] Re: K1 on USB CW

2004-06-17 Thread Leigh L. Klotz, Jr.
I just picked up a copy of the June CQ in the airport bookshop and p.28 has a sidebar by K2MGA (CQ Publisher) on the history of SSB: Regardless of how the SSB signal was generated, the 455 kc USB signal was mixed up to 9 Mc. Using a converted war-surplus BC-458 transmitter...as a VFO,

Re: [Elecraft] Re: K1 on USB CW

2004-06-17 Thread Vic Rosenthal
Leigh L. Klotz, Jr. wrote: I just picked up a copy of the June CQ in the airport bookshop and p.28 has a sidebar by K2MGA (CQ Publisher) on the history of SSB: Regardless of how the SSB signal was generated, the 455 kc USB signal was mixed up to 9 Mc. Using a converted war-surplus

Re: [Elecraft] Re: K1 on USB CW

2004-06-17 Thread Leigh L. Klotz, Jr.
As I read it, the USB signal was generated at 455Kc and then mixed up to 9Mc, thus giving a USB 9Mc signal. The VFO was then in thr 4.0-5.3Mc range. And that was added or subtracted... On Thu, 17 Jun 2004 8:02pm, Vic Rosenthal wrote: Leigh L. Klotz, Jr. wrote: I just picked up a copy of

Re: [Elecraft] Re: K1 on USB CW

2004-06-17 Thread Steve Lawrence
Vic - As I recall from about a million years ago, when the hardware was actually built, when you subtracted to get to 75m, the sideband reversed. If not, the standard on 160-80-40 today would be USB - but it isn't. 73, Steve WB6RSE On Jun 17, 2004, at 4:59 PM, Vic Rosenthal wrote: This is

Re: [Elecraft] Re: K1 on USB CW

2004-06-17 Thread Don Wilhelm
I just looked at my old copy of the NEW Sideband Handbook by Don Stoner W6TNS, copyright 1958 - I have 6th printing dated June 1966. Page 94 shows the schematic of the Central Electronics 10B phasing exciter - and it DOES generate SSB at a fixed 9 MHz (unchanged from the 10A). The addition of a

Re: [Elecraft] Re: K1 on USB CW

2004-06-17 Thread N2EY
In a message dated 6/17/04 7:10:03 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: I just picked up a copy of the June CQ in the airport bookshop and p.28 has a sidebar by K2MGA (CQ Publisher) on the history of SSB: Regardless of how the SSB signal was generated, the 455 kc USB

Re: [Elecraft] Re: K1 on USB CW

2004-06-17 Thread Stuart Rohre
I mis remembered, it was a 9 MHz VFO in the radio I described, the one from ZL1AAX, apparently. Thanks math gurus. 73 Stuart