Kunena Site Syndication http://www.microwave.gr Sat, 19 May 2012 03:55:16 +0000 Kunena 1.0.8 http://www.microwave.gr/components/com_kunena/template/default_ex/images/english/emoticons/rss.gif http://www.microwave.gr Kunena Site Syndication http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,122/#132 Okay then, lets go for hunting one on ebay... Thank you very much for your help ! Mon, 30 Apr 2012 06:40:15 +0000 http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,54/#131 Thanks I will let you know! Mon, 30 Apr 2012 06:27:03 +0000 http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,54/#130 BUT if you need specific information regarding these receivers schematics, I could help ? (if you allow me some times as I don't even carry a scanner at home !! ) have a good day Sun, 29 Apr 2012 20:16:53 +0000 http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,122/#129 I am not very sure. I believe the diode type is the one that defines mainly the characteristics of the mixer, at least frequency response at different local oscillator values. I do not think that the mixer diode housing plays an important role on coaxial mixer characteristics. Sage 1025 carries a 1N23 diode. I have tried a 1N23 diode in another coaxial mixer housing and I am able to see signals at about the right frequency on the dial. Sun, 29 Apr 2012 19:32:46 +0000 http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,122/#128 Okay ; I do carry a signal combiner MSC 1205/1705, I was looking for a more convenient way to avoid soldering a universal 1N23 (sage 1026H substitute) to a coax going to "common" port of MSC 1205/1705. Then I understand that it would be necessary the know the characteristics of this "unknown" sage 1026, to get a closer substitute ? Thank you very much Thank you very much Sun, 29 Apr 2012 17:29:09 +0000 http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,122/#127 Well, every diode mixer could possibly be used to downconvert higher frequencies, but there are actually three major problems. First, the mixer has to be a harmonic one, because the output of the local oscillator of the receiver is 1-2.5GHz. Second, it has to be a two-port mixer, since the local oscillator and IF signals are combined together on the receiver signal combiner, so it has to have these two signals combined. Third, if you use another mixer diode than the original one used in the receiver it may not be calibrated to the receiver scale. Sun, 29 Apr 2012 08:34:10 +0000 http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,122/#126 Hi there, Could this one be okay to replkace the sage 1026H ? :http://www.ebay.com/itm/Hp-Agilent-33330B-Broadband-Coaxial-Crystal-Detector-01-18-Ghz-/300701779771?pt=LH_DefaultDomain_0&hash=item460339073b Maybe we could find something similar to replace the 40 gig mixer you're looking for also ? Thank you Sun, 29 Apr 2012 06:38:57 +0000 http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,54/#125 These are paper manuals: pretty heavy & contains too much pages to scan ! but I got these (photocopied) manuals and the above mentioned receivers thru ebay... Sun, 22 Apr 2012 20:36:15 +0000 http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,122/#124 I looked through the technical manual of the receiver. It does not say anything about the external waveguide mixers but is says the model of the first coaxial external mixer, which is the Sage 1026H. This uses a 1N23E diode, so I guess even if you could not find this part any 1N23E detector will do! The "E" specifies the diode noise figure, so other 1N23 diodes should be ok to use at different noise figures. To operate the receiver on external mixers you also need a combiner for it, which is the MSC 1205/1705. You can find one at a really cheap price here: http://www.ebay.com/itm/Micro-Tel-MSC-1205-1705-Microwave-Signal-Combiner-/160742382583?pt=Wissenschaftliche_Ger%C3%A4te&hash=item256cfe1bf7 I would buy this essential but rare part but I have already one! Does anyone have any other info about the waveguide mixers used on this? especially on 40GHz and up? Sat, 21 Apr 2012 22:28:30 +0000 http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,54/#123 Do you have the manuals for the MSR-904 and PR-700A? It would be helpful if you could provide them somehow? Sat, 21 Apr 2012 22:19:27 +0000 http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,122/#122 Hello, Anybody have informations concerning equivalent /substitution for original external mixers for this receiver ? Thank you Sat, 21 Apr 2012 21:38:51 +0000 http://www.microwave.gr/component/option,com_kunena/Itemid,122/func,view/catid,11/id,54/#121 Yep, i own these receivers also (1200-_MSR-904 and PR-700As)still interested about the connector ? Let me know Sat, 21 Apr 2012 21:34:12 +0000