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#31
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On Sat, 21 Feb 2004 12:28:13 +0000, Paul Burridge
wrote: Anyone care to nominate an RF mixer chip for 100Mhz that's readily available in the UK? give 'em a call for free samples... EUROPE Hittite Microwave Europe Ltd Sales and Applications 4.1 Intec Wade Road, Basingstoke Hampshire, RG24 8NE, United Kingdom E-Mail: Phone: +44 1-256-817-000 Fax: +44 1-256-817-111 [] Remove "HeadFromButt", before replying by email. |
#32
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![]() Paul Burridge wrote: Anyone care to nominate an RF mixer chip for 100Mhz that's readily available in the UK? What sort of performance is required? Diode mixers are easy to obtain and have good IMD characteristics. The impedances on the ports need to be properly matched. Leon -- Leon Heller, G1HSM Email: My low-cost Philips LPC210x ARM development system: http://www.geocities.com/leon_heller/lpc2104.html |
#33
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![]() Paul Burridge wrote: Anyone care to nominate an RF mixer chip for 100Mhz that's readily available in the UK? What sort of performance is required? Diode mixers are easy to obtain and have good IMD characteristics. The impedances on the ports need to be properly matched. Leon -- Leon Heller, G1HSM Email: My low-cost Philips LPC210x ARM development system: http://www.geocities.com/leon_heller/lpc2104.html |
#34
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On Sat, 21 Feb 2004 18:22:44 +0000, Leon Heller
wrote: Paul Burridge wrote: Anyone care to nominate an RF mixer chip for 100Mhz that's readily available in the UK? What sort of performance is required? "Good." :-) Diode mixers are easy to obtain and have good IMD characteristics. The impedances on the ports need to be properly matched. What - the sort of crossed diode config one often sees in the ham design books? Do you think I might as well just make one up from discretes? I'm basically just trying to combine 60Mhz with 20Mhz to end up with the difference frequency in this case. JJ suggested a chip, but looking at the data sheet, it seemed to be designed more as a modulator than a mixer. Let's not get into an argument over semantics but y'all know what I mean, I'm sure. BTW, thanks for a good steer with the Pulsonix suggestion, Leon. I'm making good progress getting to grips with it. -- The BBC: Licensed at public expense to spread lies. |
#35
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On Sat, 21 Feb 2004 18:22:44 +0000, Leon Heller
wrote: Paul Burridge wrote: Anyone care to nominate an RF mixer chip for 100Mhz that's readily available in the UK? What sort of performance is required? "Good." :-) Diode mixers are easy to obtain and have good IMD characteristics. The impedances on the ports need to be properly matched. What - the sort of crossed diode config one often sees in the ham design books? Do you think I might as well just make one up from discretes? I'm basically just trying to combine 60Mhz with 20Mhz to end up with the difference frequency in this case. JJ suggested a chip, but looking at the data sheet, it seemed to be designed more as a modulator than a mixer. Let's not get into an argument over semantics but y'all know what I mean, I'm sure. BTW, thanks for a good steer with the Pulsonix suggestion, Leon. I'm making good progress getting to grips with it. -- The BBC: Licensed at public expense to spread lies. |
#36
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Anyone care to nominate an RF mixer chip for 100Mhz that's readily
available in the UK? ================================ SA602AN as well as SA612AN each costing GBP 2.50 Both have on-board LO circuit. www.modecomponents.co.uk ,probably also from www.jabdog.com Both companies are in the Birmingham area. If you are a member of G-QRP Club the SA602AN is somewhat cheaper from Club Sales. Frank GM0CSZ / KN6WH |
#37
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Anyone care to nominate an RF mixer chip for 100Mhz that's readily
available in the UK? ================================ SA602AN as well as SA612AN each costing GBP 2.50 Both have on-board LO circuit. www.modecomponents.co.uk ,probably also from www.jabdog.com Both companies are in the Birmingham area. If you are a member of G-QRP Club the SA602AN is somewhat cheaper from Club Sales. Frank GM0CSZ / KN6WH |
#38
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The Philips SA602 or SA612 ought to be available in the UK. Don't overload
the RF port though, the gain folds back over 200mV RF input -- confuses the hell out of an AGC loop. "Paul Burridge" wrote in message ... Anyone care to nominate an RF mixer chip for 100Mhz that's readily available in the UK? -- The BBC: Licensed at public expense to spread lies. |
#39
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The Philips SA602 or SA612 ought to be available in the UK. Don't overload
the RF port though, the gain folds back over 200mV RF input -- confuses the hell out of an AGC loop. "Paul Burridge" wrote in message ... Anyone care to nominate an RF mixer chip for 100Mhz that's readily available in the UK? -- The BBC: Licensed at public expense to spread lies. |
#40
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On a sunny day (Sat, 21 Feb 2004 19:22:15 +0000) it happened Paul Burridge
wrote in : On Sat, 21 Feb 2004 18:22:44 +0000, Leon Heller wrote: Paul Burridge wrote: Anyone care to nominate an RF mixer chip for 100Mhz that's readily available in the UK? What sort of performance is required? "Good." :-) Diode mixers are easy to obtain and have good IMD characteristics. The impedances on the ports need to be properly matched. What - the sort of crossed diode config one often sees in the ham design books? Do you think I might as well just make one up from discretes? I'm basically just trying to combine 60Mhz with 20Mhz to end up with the difference frequency in this case. JJ suggested a chip, but looking at the data sheet, it seemed to be designed more as a modulator than a mixer. Let's not get into an argument over semantics but y'all know what I mean, I'm sure. BTW, thanks for a good steer with the Pulsonix suggestion, Leon. I'm making good progress getting to grips with it. I do this with a dual gate MOSFET, osc on second gate, signal on first. A voltage divider on gate 2 to set it in teh non-linear part. This works very well, is not critical, very cheap and extremely reliable. Also the noise figure is good. So tuned 40MHz in drain I did one some weeks agao, but cant remember what that was for? Anyway that sceme works up to a GHz , from kHz up. If you need diagram and part example I could draw up one here. Copyright Jan Panteltje 2004 All Right Reserved By reading this you agree to pay me 1 fc. |
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