Hello Eagle Group,
According to our e-mail correspondence with Bob McGwier today, I would like to repeat my offer to design and build L-band receiver for Eagle. I am designer of P3E L-band receiver (including command receiver and 5 MHz backup oscillator). At present I solve AGC for both mode - analog/SDX. You can see http://www.urel.feec.vutbr.cz/esl/files/Projects/P3E.htm. Already two years ago I promised to built L-band receiver also for Eagle. All my friends from AMSAT-NA showed pleasure, but project managing people didn't ask me officially. So my offer is still valid. Best regards.
Mirek Kasal, OK2AQK AMSAT-NA LM2326
Mirek:
I cannot tell you how happy I am you are here and that you want to help with our RF work. We are making some changes to be announced shortly, and your efforts will be appreciated. We are going to need some microwave receiver work higher than L band. Your contributions would be appreciated there as well.
Welcome aboard!
Bob
Miroslav Kasal wrote:
Hello Eagle Group,
According to our e-mail correspondence with Bob McGwier today, I would like to repeat my offer to design and build L-band receiver for Eagle. I am designer of P3E L-band receiver (including command receiver and 5 MHz backup oscillator). At present I solve AGC for both mode - analog/SDX. You can see http://www.urel.feec.vutbr.cz/esl/files/Projects/P3E.htm. Already two years ago I promised to built L-band receiver also for Eagle. All my friends from AMSAT-NA showed pleasure, but project managing people didn't ask me officially. So my offer is still valid. Best regards.
Mirek Kasal, OK2AQK AMSAT-NA LM2326 _______________________________________________ Via the Eagle mailing list courtesy of AMSAT-NA Eagle@amsat.org http://amsat.org/mailman/listinfo/eagle
Welcome to the group. I see that there are 2 paths through the P3E 23 cm receiver -- one with ceramic filters and one without. What's the bandwidth of the Rudak output?
73,
John KD6OZH
----- Original Message ----- From: "Miroslav Kasal" kasal@feec.vutbr.cz To: eagle@amsat.org Sent: Thursday, September 21, 2006 18:53 UTC Subject: [eagle] Eagle L-band receiver
Hello Eagle Group,
According to our e-mail correspondence with Bob McGwier today, I would like to repeat my offer to design and build L-band receiver for Eagle. I am designer of P3E L-band receiver (including command receiver and 5 MHz backup oscillator). At present I solve AGC for both mode - analog/SDX. You can see http://www.urel.feec.vutbr.cz/esl/files/Projects/P3E.htm. Already two years ago I promised to built L-band receiver also for Eagle. All my friends from AMSAT-NA showed pleasure, but project managing people didn't ask me officially. So my offer is still valid. Best regards.
Mirek Kasal, OK2AQK AMSAT-NA LM2326 _______________________________________________ Via the Eagle mailing list courtesy of AMSAT-NA Eagle@amsat.org http://amsat.org/mailman/listinfo/eagle
Hi John,
Thanks for the message. Yes, you are right. The originaly planed RUDAK output bandwidth is about 250 kHz (150 kHz nominal) below the analog passband with center 10.7 MHz and bandwidth 150 kHz. However RUDAK system will be not implemented into P3E and will be changed by SDX. We assume to connect SDX to the same output. Only AGC is need to modify for both modes.
73, Mirek OK2AQK
John B. Stephensen wrote:
Welcome to the group. I see that there are 2 paths through the P3E 23 cm receiver -- one with ceramic filters and one without. What's the bandwidth of the Rudak output?
73,
John KD6OZH
Hi John,
Thanks for the message. Yes, you are right. The originally planed RUDAK output bandwidth is about 250 kHz (150 kHz nominal) below the analog passband with center 10.7 MHz and bandwidth 150 kHz. However RUDAK system will be not implemented into P3E and will be changed by SDX. We assume to connect SDX to the same output. Only AGC is need to modify for both modes.
73, Mirek OK2AQK
John B. Stephensen wrote:
Welcome to the group. I see that there are 2 paths through the P3E 23 cm receiver -- one with ceramic filters and one without. What's the bandwidth of the Rudak output?
73,
John KD6OZH
Could the RUDAK output be widened to 1 MHz?
73,
John KD6OZH
----- Original Message ----- From: "Miroslav Kasal" kasal@feec.vutbr.cz To: "John B. Stephensen" kd6ozh@comcast.net Cc: eagle@amsat.org Sent: Saturday, September 23, 2006 16:37 UTC Subject: Re: [eagle] Eagle L-band receiver
Hi John,
Thanks for the message. Yes, you are right. The originally planed RUDAK output bandwidth is about 250 kHz (150 kHz nominal) below the analog passband with center 10.7 MHz and bandwidth 150 kHz. However RUDAK system will be not implemented into P3E and will be changed by SDX. We assume to connect SDX to the same output. Only AGC is need to modify for both modes.
73, Mirek OK2AQK
John B. Stephensen wrote:
Welcome to the group. I see that there are 2 paths through the P3E 23 cm receiver -- one with ceramic filters and one without. What's the bandwidth of the Rudak output?
73,
John KD6OZH
It seems to me as difficult. Maybe it will be better to do a new simple IF chain with this bandwidth. The command receiver is designed by similar way.
Mirek
John B. Stephensen wrote:
Could the RUDAK output be widened to 1 MHz?
73,
John KD6OZH
----- Original Message ----- From: "Miroslav Kasal" kasal@feec.vutbr.cz To: "John B. Stephensen" kd6ozh@comcast.net Cc: eagle@amsat.org Sent: Saturday, September 23, 2006 16:37 UTC Subject: Re: [eagle] Eagle L-band receiver
Hi John,
Thanks for the message. Yes, you are right. The originally planed RUDAK output bandwidth is about 250 kHz (150 kHz nominal) below the analog passband with center 10.7 MHz and bandwidth 150 kHz. However RUDAK system will be not implemented into P3E and will be changed by SDX. We assume to connect SDX to the same output. Only AGC is need to modify for both modes.
73, Mirek OK2AQK
John B. Stephensen wrote:
Welcome to the group. I see that there are 2 paths through the P3E 23 cm receiver -- one with ceramic filters and one without. What's the bandwidth of the Rudak output?
73,
John KD6OZH
We can support a single front end and two IF chains inernally especially for L band. One for a 10.7 MHz QSD/SDX based linear transponder input. The other for a QSD 10.7+difference IF feeding up to, but not exceeding 200 kHz bandwidth. I will be uploading new spread sheets for all the recommended bands/modes soon after Jim makes his announcement.
Bob
Miroslav Kasal wrote:
It seems to me as difficult. Maybe it will be better to do a new simple IF chain with this bandwidth. The command receiver is designed by similar way.
Mirek
John B. Stephensen wrote:
Could the RUDAK output be widened to 1 MHz?
73,
John KD6OZH
----- Original Message ----- From: "Miroslav Kasal" kasal@feec.vutbr.cz To: "John B. Stephensen" kd6ozh@comcast.net Cc: eagle@amsat.org Sent: Saturday, September 23, 2006 16:37 UTC Subject: Re: [eagle] Eagle L-band receiver
Hi John,
Thanks for the message. Yes, you are right. The originally planed RUDAK output bandwidth is about 250 kHz (150 kHz nominal) below the analog passband with center 10.7 MHz and bandwidth 150 kHz. However RUDAK system will be not implemented into P3E and will be changed by SDX. We assume to connect SDX to the same output. Only AGC is need to modify for both modes.
73, Mirek OK2AQK
John B. Stephensen wrote:
Welcome to the group. I see that there are 2 paths through the P3E 23 cm receiver -- one with ceramic filters and one without. What's the bandwidth of the Rudak output?
73,
John KD6OZH
Via the Eagle mailing list courtesy of AMSAT-NA Eagle@amsat.org http://amsat.org/mailman/listinfo/eagle
participants (3)
-
John B. Stephensen -
Miroslav Kasal -
Robert McGwier