RE: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter
Thanks Jim You make excellent and insight points as always. I have encountered the issues you speak about in interfacing my 610's with various vintage receivers like my NC-300 and 75A4. Thank goodness that I stumbled across small 455Khz and other frequencies "IF" cans at Antique Electronics Supply in Phoenix. With some minor surgery both 610's are monitoring received signals on my receivers. On the NC-300 I went directly to the plate of the 2nd IF and coupled it through a 5PF mica. On the 75A4 I went to the grid of the 2nd detector tube and used 4.3 PF mica. Both have full deflection and ad a bit of "fun" to monitoring by being able to see the everyone's signal. But then, it has been mentioned from time to time that I am "a tad" obsessive about these beautiful old boat anchors. Cheers my friend Ron Weaver W6OM www.qsl.net/w6om -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Geoff/W5OMR Sent: Monday, February 11, 2008 7:19 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter Jim Wilhite wrote: > To anyone considering an SB 610 or 614, keep in mind they must be > constructed to match the IF frequency of the receiver to which they > will be interfaced. Uh... I was under the impression that the 610 / 614 monitor scopes were for monitoring the 'transmitted' signal. > > Some of them were built to work with the Heath receivers with the 3 > meg IF and those that were built for 455 Kc. had the coils that would > do so. > > If you find one for with the 3 Kc IF coils, kc? you said 3meg(sic). Which is it? > it won't work properly with a NC 300 or NC 183D for example. Heath > packaged the coils for both with the units and the builder chose which > he wanted. I doubt you will receive the coils that were not used > during construction. Check them out before you find you have > something that won't work with your receiver. So... I was under the impression that the 610 / 614 monitor scopes were for monitoring the 'transmitted' signal. Since I wasn't sure, I went looking. http://web.comhem.se/~u87540545/Heathkit/Products/pageSB610.htm Heathkit SB-610 The Heathkit SB-610 monitor scope is primarily designed for monitor the RF-signals, on-the-air signals, from the local transmitter. It can also be used to monitor received signals when connected to a receiver. It monitors RF-envelop, RF-trapezoid and RTTY pattern. SB-610 has also a built-in two-tone sinewave AF-oscillator for SSB-transmitter adjustment. The Monitor-Scope matches the SB-line. -- Driving your AM Rig without a scope, is like driving your car at night, without headlights. (K4KYV) -- 73 = Best Regards, -Geoff/W5OMR __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter
Jim Wilhite wrote: To anyone considering an SB 610 or 614, keep in mind they must be constructed to match the IF frequency of the receiver to which they will be interfaced. Uh... I was under the impression that the 610 / 614 monitor scopes were for monitoring the 'transmitted' signal. Some of them were built to work with the Heath receivers with the 3 meg IF and those that were built for 455 Kc. had the coils that would do so. If you find one for with the 3 Kc IF coils, kc? you said 3meg(sic). Which is it? it won't work properly with a NC 300 or NC 183D for example. Heath packaged the coils for both with the units and the builder chose which he wanted. I doubt you will receive the coils that were not used during construction. Check them out before you find you have something that won't work with your receiver. So... I was under the impression that the 610 / 614 monitor scopes were for monitoring the 'transmitted' signal. Since I wasn't sure, I went looking. http://web.comhem.se/~u87540545/Heathkit/Products/pageSB610.htm Heathkit SB-610 The Heathkit SB-610 monitor scope is primarily designed for monitor the RF-signals, on-the-air signals, from the local transmitter. It can also be used to monitor received signals when connected to a receiver. It monitors RF-envelop, RF-trapezoid and RTTY pattern. SB-610 has also a built-in two-tone sinewave AF-oscillator for SSB-transmitter adjustment. The Monitor-Scope matches the SB-line. -- Driving your AM Rig without a scope, is like driving your car at night, without headlights. (K4KYV) -- 73 = Best Regards, -Geoff/W5OMR __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter
To anyone considering an SB 610 or 614, keep in mind they must be constructed to match the IF frequency of the receiver to which they will be interfaced. Some of them were built to work with the Heath receivers with the 3 meg IF and those that were built for 455 Kc. had the coils that would do so. If you find one for with the 3 Kc IF coils, it won't work properly with a NC 300 or NC 183D for example. Heath packaged the coils for both with the units and the builder chose which he wanted. I doubt you will receive the coils that were not used during construction. Check them out before you find you have something that won't work with your receiver. Jim/W5JO __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter
Speaking of SB 610's, I have a SB-614 for sale that looks like new. It's just beautiful. Have no idea it's worth, so a fair offer will be accepted. Phil Philip LaMarche LaMarche Enterprises, Inc. www.instantgourmetspices.com www.w9dvm.com 800-395-7795 pin 02 727-944-3226 FAX 727-937-8834 NASFT 30210 W9DVM -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of EP Swynar Sent: Monday, February 11, 2008 11:17 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulationonAM transmitter Hi John, The SB-610 has been an absolutely invaluable aid here at my stations, in both the CW and voice modes (AM, as well as SSB)... All I do when monitoring 'phone transmissions here is to place the 'scope into a trapezoidal pattern. I adjust the vertical gain such that a carrier makes the line about 2/3 the height of the screen, or so, and the horizontal gain is set so that the modulated triangle is about as equilateral as it can be... When modulating 100%, the pattern should, indeed, be a full, equilateral triangle. One thing that I neglected to do until YEARS later was to pull the top RH knob out --- that's the one marked "CLAMP" --- whenever using the trapezoidal feature: by doing this, there is no image on the face of the scope until you key-up your transmitter. If you leave the knob "in" all the time, you'll eventually get a spot "burned" into the inside face of the CRT, like I did with mine here... The clamp feature keeps the point deflected off-screen into the RH side of the CRT --- as soon as you hit the transmit button on your rig, the line zips out from the right, to the centre of the tube, like magic...! Chalk one up on the importance of reading the instructions first, not later! Hi Hi. ~73~ Eddy VE3CUI - VE3XZ . I can't recall the name of the control because the scop - Original Message - From: "John King" <[EMAIL PROTECTED]> To: Sent: Monday, February 11, 2008 10:39 AM Subject: [AMRadio] Using Heath SB 610 Monitor Scope to monitor modulation onAM transmitter > Anyone experienced at using Heath SB 610 Monitor Scope > to monitor the modulation pattern of the outgoing > signal of an AM transmitter? > > I need to have session to discuss the application of > the SB 610 to that operation. > > Please email me directly for such a discussion. Your > assistance in understanding the application and > process will be greatly appreciated. Thanks and 73, > John, K5PGW > > > > Be a better friend, newshound, and > know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ > > __ > Our Main Website: http://www.amfone.net > AMRadio mailing list > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > To unsubscribe, send an email to [EMAIL PROTECTED] with > the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
