[Elecraft] IF tap?
Is there a good place to tap the IF stream for an output? I have a spectrum analyzer and was thinking of running an IF-out to the analyzer, it doesn't matter what frequency if its under a gig. -- View this message in context: http://elecraft.365791.n2.nabble.com/IF-tap-tp7144523p7144523.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] IF tap?
Steve, You did not say which transceiver you have, so we can't really answer except to say that the K3 does have an IF output if you install the KXV3 option. 73, Don W3FPR On 1/2/2012 1:51 PM, Steve KC8QVO wrote: > Is there a good place to tap the IF stream for an output? I have a spectrum > analyzer and was thinking of running an IF-out to the analyzer, it doesn't > matter what frequency if its under a gig. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] IF tap?
> Is there a good place to tap the IF stream for an output? Are you asking this about a Wells-Gardner BC-348-R? For some reason, it always seems to help if the applicable radio is identified. :-) Mike / KK5F __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] IF tap?
I figured the radio was implied since I posted in the K2 forum In any event, its a K2 SN 6950. I'm just looking for a constant frequency I can use post-VFO to run through my spectrum analyzer so I can see the band I'm on. -- View this message in context: http://elecraft.365791.n2.nabble.com/IF-tap-tp7144523p7144697.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] IF tap?
Steve, This Elecraft email reflector stopped being the K2 reflector as soon as the K1 was available, and now there are questions about the K3, K2, K1, KX1, now the KX3, KPA500, KRC2, mini-modules, and any other product that Elecraft has produced or has announced for the future. Clifton Labs Z1-K2 buffer can be installed in the K2 to provide IFoutput for your spectrum analyzer. Look at http://www.cliftonlaboratories.com/z1_buffer_amp.htm. 73, Don W3FPR On 1/2/2012 3:05 PM, Steve KC8QVO wrote: > I figured the radio was implied since I posted in the K2 forum In any event, > its a K2 SN 6950. I'm just looking for a constant frequency I can use > post-VFO to run through my spectrum analyzer so I can see the band I'm on. > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] IF tap?
Or to your softrock for a panadaptor. Clifton Labs has high quailty/easy to build IF ports. I put one together in my K2, it works excellent. Leroy AB7CE -Original Message- From: Don Wilhelm Sent: Monday, January 02, 2012 2:01 PM To: Steve KC8QVO Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] IF tap? Steve, This Elecraft email reflector stopped being the K2 reflector as soon as the K1 was available, and now there are questions about the K3, K2, K1, KX1, now the KX3, KPA500, KRC2, mini-modules, and any other product that Elecraft has produced or has announced for the future. Clifton Labs Z1-K2 buffer can be installed in the K2 to provide IFoutput for your spectrum analyzer. Look at http://www.cliftonlaboratories.com/z1_buffer_amp.htm. 73, Don W3FPR On 1/2/2012 3:05 PM, Steve KC8QVO wrote: > I figured the radio was implied since I posted in the K2 forum In any > event, > its a K2 SN 6950. I'm just looking for a constant frequency I can use > post-VFO to run through my spectrum analyzer so I can see the band I'm on. > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] IF tap?
Don Wilhelm-4 wrote > > Steve, > > This Elecraft email reflector stopped being the K2 reflector as soon as > the K1 was available, and now there are questions about the K3, K2, K1, > KX1, now the KX3, KPA500, KRC2, mini-modules, and any other product that > Elecraft has produced or has announced for the future. > > Clifton Labs Z1-K2 buffer can be installed in the K2 to provide > IFoutput for your spectrum analyzer. Look at > http://www.cliftonlaboratories.com/z1_buffer_amp.htm. > > 73, > Don W3FPR > In regards to the reflector/forum - I posted on the website under the K2 forum. There are also categories for the K1, KX1, K3, etc. I am not using the e-mail system to get the post in to the reflector. I forgot that the e-mail list does not "categorize" posts in the same regard that the website does for the reflector. Just playing around here - I dug out my manual and found the RX Mixer. I tapped the Post-Mixer Amp side of C159 and the ground side of R80 with a length of RG-174. Then I ran that back to the receive antenna connector on the 160 module (desoldered the wires to the 160 module). I figured this would give me a 4.915mHz reference from which to tap but it doesn't work too well. There's more to learn here for sure. I figured there would be a place in the circuit I could tap to bring out the IF to the analyzer. Would I not be correct in assuming that the spectrum analyzer can read the same signal(s) fed to the rest of the K2's receiver? -- View this message in context: http://elecraft.365791.n2.nabble.com/IF-tap-tp7144523p7145046.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] IF tap?
Steve, One cannot usually use a spectrum analyzer "in situ" like you would an oscilloscope - the spectrum analyzer has a 50 ohm input and will load the "circuit under test" significantly. That is why you need the buffer amplifier. 73, Don W3FPR On 1/2/2012 5:35 PM, Steve KC8QVO wrote: > Just playing around here - I dug out my manual and found the RX Mixer. > I tapped the Post-Mixer Amp side of C159 and the ground side of R80 > with a length of RG-174. Then I ran that back to the receive antenna > connector on the 160 module (desoldered the wires to the 160 module). > I figured this would give me a 4.915mHz reference from which to tap > but it doesn't work too well. There's more to learn here for sure. I > figured there would be a place in the circuit I could tap to bring out > the IF to the analyzer. Would I not be correct in assuming that the > spectrum analyzer can read the same signal(s) fed to the rest of the > K2's receiver? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] IF tap?
Steve, Installing a buffer amp such as the Clifton Labs Z1 - K2 is the "cleanest" solution, but there is an alternative if you are just playing :-) Depending on the level of the natural noise floor of your Spectrum Analyzer and the interconnecting coax's capacitance, the IF signal at the emitter of the post-mixer amp Q22 might be strong enough to drive the Spectrum Analyzer. To avoid "upsetting" the post-mixer amp, you would have to connect your Analyzer's "hot" input to Q22's emitter via a R and C in series. I suggest that the value of the added capacitor be 10nF, and that the value of the added R be not less than 470 ohms. The function of the added capacitor is only to prevent any DC from the K2 reaching your Spectrum Analyzer. The shield of the coax at the post-mixer amp end should be grounded using the same pad (if possible) which is used to ground one side of C162. Have fun! 73, Geoff LX2AO - Original Message - From: "Steve KC8QVO" To: Sent: Monday, January 02, 2012 11:35 PM Subject: Re: [Elecraft] IF tap? > > Don Wilhelm-4 wrote >> >> Steve, >> >> This Elecraft email reflector stopped being the K2 reflector as soon as >> the K1 was available, and now there are questions about the K3, K2, K1, >> KX1, now the KX3, KPA500, KRC2, mini-modules, and any other product that >> Elecraft has produced or has announced for the future. >> >> Clifton Labs Z1-K2 buffer can be installed in the K2 to provide >> IFoutput for your spectrum analyzer. Look at >> http://www.cliftonlaboratories.com/z1_buffer_amp.htm. >> >> 73, >> Don W3FPR >> > > In regards to the reflector/forum - I posted on the website under the K2 > forum. There are also categories for the K1, KX1, K3, etc. I am not using > the e-mail system to get the post in to the reflector. I forgot that the > e-mail list does not "categorize" posts in the same regard that the > website > does for the reflector. > > Just playing around here - I dug out my manual and found the RX Mixer. I > tapped the Post-Mixer Amp side of C159 and the ground side of R80 with a > length of RG-174. Then I ran that back to the receive antenna connector on > the 160 module (desoldered the wires to the 160 module). I figured this > would give me a 4.915mHz reference from which to tap but it doesn't work > too > well. There's more to learn here for sure. > > I figured there would be a place in the circuit I could tap to bring out > the > IF to the analyzer. Would I not be correct in assuming that the spectrum > analyzer can read the same signal(s) fed to the rest of the K2's receiver? > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/IF-tap-tp7144523p7145046.html > Sent from the Elecraft mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
