Re: RE: [Elecraft] K3: General Coverage Receive Filter
I've been using the RX ANT jack on the AM broadcast band (makes a big difference below 1 MHz), and the standard antenna input on the higher freqs, where I don't believe there is any measurable advantage to using RX ANT. Mark - Original Message - From: Brett Howard <[EMAIL PROTECTED]> Date: Monday, July 28, 2008 16:46 Subject: RE: [Elecraft] K3: General Coverage Receive Filter To: 'Mark Volstad' <[EMAIL PROTECTED]> Cc: Elecraft@mailman.qth.net > Mark when you do this are you using the RX ANT jack or are you > using the > standard input? > > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Mark Volstad > Sent: Monday, July 28, 2008 1:07 PM > To: Iain MacDonnell - K6IAM > Cc: Elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3: General Coverage Receive Filter > > The Drake and JRC models I mentioned are not amateur > transceivers; they are > highly-regarded shortwave receivers. Like many others, I became > a ham only > after > developing a strong interest in shortwave and AM broadcast band > DXing during > my teens. > You know -- all those frequencies between 0.5 KHz and 30 MHz > that are > outside the amateur bands. ;-) > Adding the GC option to the K3 has allowed me to once again > fully enjoy that > hobby > after these many years. If you'd like to learn more, check out > http://en.wikipedia.org/wiki/Shortwave_listening > > Mark > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3: General Coverage Receive Filter
Mark when you do this are you using the RX ANT jack or are you using the standard input? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Volstad Sent: Monday, July 28, 2008 1:07 PM To: Iain MacDonnell - K6IAM Cc: Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3: General Coverage Receive Filter The Drake and JRC models I mentioned are not amateur transceivers; they are highly-regarded shortwave receivers. Like many others, I became a ham only after developing a strong interest in shortwave and AM broadcast band DXing during my teens. You know -- all those frequencies between 0.5 KHz and 30 MHz that are outside the amateur bands. ;-) Adding the GC option to the K3 has allowed me to once again fully enjoy that hobby after these many years. If you'd like to learn more, check out http://en.wikipedia.org/wiki/Shortwave_listening Mark - Original Message - From: Iain MacDonnell - K6IAM <[EMAIL PROTECTED]> Date: Monday, July 28, 2008 14:57 Subject: Re: [Elecraft] K3: General Coverage Receive Filter To: Mark Volstad <[EMAIL PROTECTED]> Cc: Elecraft@mailman.qth.net > > Hi Mark, > > Can you be more specific? What function of the Drake or JRC > could you > not replace without the general coverage receiver option ? > > ~Iain > > > Mark Volstad wrote on 07/28/08 11:38: > > In my case the motivation was simple: I wanted to save the > $1000+ it would otherwise > > have cost me to purchase a second-hand Drake R8B or JRC NRD-545! > > > > Now if only we could get the synchronous AM detection upgrade, > I'd be happier than > > a pig in poop. (Nudge, nudge...) > > > > Mark > > > > > > I'd been meaning to ask for a while; what is the > motivation for those > > of you who have ordered the general coverage receiver option? > i.e. what > > makes it worth the extra $129 ?? > > > > ~Iain > > > > ___ > > Elecraft mailing list > > Post to: Elecraft@mailman.qth.net > > You must be a subscriber to post to the list. > > Subscriber Info (Addr. Change, sub, unsub etc.): > > > http://mailman.qth.net/mailman/listinfo/elecraft > > > > Help: http://mailman.qth.net/subscribers.htm > > Elecraft web page: http://www.elecraft.com > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: General Coverage Receive Filter
The Drake and JRC models I mentioned are not amateur transceivers; they are highly-regarded shortwave receivers. Like many others, I became a ham only after developing a strong interest in shortwave and AM broadcast band DXing during my teens. You know -- all those frequencies between 0.5 KHz and 30 MHz that are outside the amateur bands. ;-) Adding the GC option to the K3 has allowed me to once again fully enjoy that hobby after these many years. If you'd like to learn more, check out http://en.wikipedia.org/wiki/Shortwave_listening Mark - Original Message - From: Iain MacDonnell - K6IAM <[EMAIL PROTECTED]> Date: Monday, July 28, 2008 14:57 Subject: Re: [Elecraft] K3: General Coverage Receive Filter To: Mark Volstad <[EMAIL PROTECTED]> Cc: Elecraft@mailman.qth.net > > Hi Mark, > > Can you be more specific? What function of the Drake or JRC > could you > not replace without the general coverage receiver option ? > > ~Iain > > > Mark Volstad wrote on 07/28/08 11:38: > > In my case the motivation was simple: I wanted to save the > $1000+ it would otherwise > > have cost me to purchase a second-hand Drake R8B or JRC NRD-545! > > > > Now if only we could get the synchronous AM detection upgrade, > I'd be happier than > > a pig in poop. (Nudge, nudge...) > > > > Mark > > > > > > I'd been meaning to ask for a while; what is the > motivation for those > > of you who have ordered the general coverage receiver option? > i.e. what > > makes it worth the extra $129 ?? > > > > ~Iain > > > > ___ > > Elecraft mailing list > > Post to: Elecraft@mailman.qth.net > > You must be a subscriber to post to the list. > > Subscriber Info (Addr. Change, sub, unsub etc.): > > > http://mailman.qth.net/mailman/listinfo/elecraft > > > > Help: http://mailman.qth.net/subscribers.htm > > Elecraft web page: http://www.elecraft.com > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3: General Coverage Receive Filter
The K3 has greatly reduced sensitivity outside of the Amateur bands. The bandpass filters are designed to be just slightly wider than the amateur bands so as to reduce interference caused by broadcast stations outside of them. Well if it's the broadcast stations that you want to listen to these amateur only band pass filters give you poor reception of the broadcast bands. The general coverage receive option gives you a path around the amateur only band pass filters and provides wider filters for when you want to listen outside the ham bands. Granted the K3 has the ability to receive between the bands with out the module but the receiver is not being used to its full abilities unless you install the general coverage receive option. ~Brett -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Iain MacDonnell - K6IAM Sent: Monday, July 28, 2008 11:57 AM To: Mark Volstad Cc: Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3: General Coverage Receive Filter Hi Mark, Can you be more specific? What function of the Drake or JRC could you not replace without the general coverage receiver option ? ~Iain Mark Volstad wrote on 07/28/08 11:38: > In my case the motivation was simple: I wanted to save the $1000+ it would otherwise > have cost me to purchase a second-hand Drake R8B or JRC NRD-545! > > Now if only we could get the synchronous AM detection upgrade, I'd be happier than > a pig in poop. (Nudge, nudge...) > > Mark > > > I'd been meaning to ask for a while; what is the motivation for those > of you who have ordered the general coverage receiver option? i.e. what > makes it worth the extra $129 ?? > > ~Iain > > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: General Coverage Receive Filter
Hi Mark, Can you be more specific? What function of the Drake or JRC could you not replace without the general coverage receiver option ? ~Iain Mark Volstad wrote on 07/28/08 11:38: In my case the motivation was simple: I wanted to save the $1000+ it would otherwise have cost me to purchase a second-hand Drake R8B or JRC NRD-545! Now if only we could get the synchronous AM detection upgrade, I'd be happier than a pig in poop. (Nudge, nudge...) Mark I'd been meaning to ask for a while; what is the motivation for those of you who have ordered the general coverage receiver option? i.e. what makes it worth the extra $129 ?? ~Iain ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: General Coverage Receive Filter
Ian Besides casual listening around the HF bands, it turns the K3 into another piece of test equipment in the shack. The K3 calibration is pretty darn good, so you can measure the frequency of a signal and be very close to its absolute frequency. Or just listen to an oscillator that operates outside the ham bands, such as those in a homebrew RX or TX. 73, Bob N6WG - Original Message - From: "Iain MacDonnell - K6IAM" <[EMAIL PROTECTED]> To: "Ron D'Eau Claire" <[EMAIL PROTECTED]> Cc: "'Joe Word'" <[EMAIL PROTECTED]>; Sent: Monday, July 28, 2008 10:46 AM Subject: Re: [Elecraft] K3: General Coverage Receive Filter > > I'd been meaning to ask for a while; what is the motivation for those > of you who have ordered the general coverage receiver option? i.e. what > makes it worth the extra $129 ?? > > ~Iain > > > Ron D'Eau Claire wrote on 07/28/08 07:35: > > Joe asked: > > > > What is the General Coverage Receive Filter, how does it work? If it is > > just > > another roofing filters, why not just use the 6.0 filter? > > > > --- > > > > It's not, Joe. The KBPF3 provides additional receiver input bandpass > > filters. > > The input bandpass filters are L/C filters that are switched > > automatically according to the frequency band selected to protect the > > receiver from strong out-of-band signals hundreds of kilohertz or even a > > few megahertz away from the desired signal. > > > > The first I.F. "roofing" filters follow later in the signal path to > > provide selectivity within a few kHz or a few hundred Hz of the desired > > signal. > > > > The basic K3 is equipped with input filters covering the 160-6 meter Ham > > bands. These filters also allow reception near the Ham bands but, as you > > tune farther from a Ham band, the sensitivity will drop off as you move > > beyond the edge of the filter bandpass. This is most apparent when > > trying to listen to AM broadcast band stations below 1,000 kHz without > > the KBPF3, but a significant loss of sensitivity occurs whenever the > > basic K3 is tuned far from a Ham band. > > > > The KBPF3 provides additional input filters that are switched in > > automatically to cover the out-of-Ham-band frequencies between 500 kHz > > and 30 MHz. > > > > Ron AC7AC > > > > > > > > ___ > > Elecraft mailing list > > Post to: Elecraft@mailman.qth.net > > You must be a subscriber to post to the list. > > Subscriber Info (Addr. Change, sub, unsub etc.): > > http://mailman.qth.net/mailman/listinfo/elecraft > > > > Help: http://mailman.qth.net/subscribers.htm > > Elecraft web page: http://www.elecraft.com > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: General Coverage Receive Filter
I'd been meaning to ask for a while; what is the motivation for those of you who have ordered the general coverage receiver option? i.e. what makes it worth the extra $129 ?? ~Iain Ron D'Eau Claire wrote on 07/28/08 07:35: Joe asked: What is the General Coverage Receive Filter, how does it work? If it is just another roofing filters, why not just use the 6.0 filter? --- It's not, Joe. The KBPF3 provides additional receiver input bandpass filters. The input bandpass filters are L/C filters that are switched automatically according to the frequency band selected to protect the receiver from strong out-of-band signals hundreds of kilohertz or even a few megahertz away from the desired signal. The first I.F. "roofing" filters follow later in the signal path to provide selectivity within a few kHz or a few hundred Hz of the desired signal. The basic K3 is equipped with input filters covering the 160-6 meter Ham bands. These filters also allow reception near the Ham bands but, as you tune farther from a Ham band, the sensitivity will drop off as you move beyond the edge of the filter bandpass. This is most apparent when trying to listen to AM broadcast band stations below 1,000 kHz without the KBPF3, but a significant loss of sensitivity occurs whenever the basic K3 is tuned far from a Ham band. The KBPF3 provides additional input filters that are switched in automatically to cover the out-of-Ham-band frequencies between 500 kHz and 30 MHz. Ron AC7AC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3: General Coverage Receive Filter
Joe asked: What is the General Coverage Receive Filter, how does it work? If it is just another roofing filters, why not just use the 6.0 filter? --- It's not, Joe. The KBPF3 provides additional receiver input bandpass filters. The input bandpass filters are L/C filters that are switched automatically according to the frequency band selected to protect the receiver from strong out-of-band signals hundreds of kilohertz or even a few megahertz away from the desired signal. The first I.F. "roofing" filters follow later in the signal path to provide selectivity within a few kHz or a few hundred Hz of the desired signal. The basic K3 is equipped with input filters covering the 160-6 meter Ham bands. These filters also allow reception near the Ham bands but, as you tune farther from a Ham band, the sensitivity will drop off as you move beyond the edge of the filter bandpass. This is most apparent when trying to listen to AM broadcast band stations below 1,000 kHz without the KBPF3, but a significant loss of sensitivity occurs whenever the basic K3 is tuned far from a Ham band. The KBPF3 provides additional input filters that are switched in automatically to cover the out-of-Ham-band frequencies between 500 kHz and 30 MHz. Ron AC7AC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: General Coverage Receive Filter
Joe -
You're confusing the band pass filtering ("allow 20 meter band into
the radio") with roofing / IF filters ("allow this narrow slice of
spectrum into the radio").
On 7/28/08, Joe Word <[EMAIL PROTECTED]> wrote:
> What is the General Coverage Receive Filter, how does it work? If it is just
> another roofing filters, why not just use the 6.0 filter?
___
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