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HF Amplifier help
I have acquired on Ebay an amplifier HF ITT 12v 100W with written following:
600942-536-001 LPA ISSB MADE IN USA Someone knows to that apparatus belongs? It is possible to find the schematic diagram? Use one 2N4427 + 2xEGC3338 + 2xMRF455 Thank you IK6GQC Rocco |
"Mario Bros" wrote in message
... I have acquired on Ebay an amplifier HF ITT 12v 100W with written following: 600942-536-001 LPA ISSB MADE IN USA Someone knows to that apparatus belongs? It is possible to find the schematic diagram? Use one 2N4427 + 2xEGC3338 + 2xMRF455 Thank you IK6GQC Rocco Mario - First comment is about the 2xEGC3338 ... these are rarely used in original production -- which leads me to believe that someone has previously repaired. The trasnsistor specs can be found at: RF Parts www.reparts.com gb |
Hi G.Beat,
it is possible. It is for that I am trying the original schematic and for knowing also like feeding the part that polarizes the two ends transistors. Ciao IK6GQC "G.Beat" ha scritto nel messaggio news:R9p3d.72371$MQ5.36165@attbi_s52... "Mario Bros" wrote in message ... I have acquired on Ebay an amplifier HF ITT 12v 100W with written following: 600942-536-001 LPA ISSB MADE IN USA Someone knows to that apparatus belongs? It is possible to find the schematic diagram? Use one 2N4427 + 2xEGC3338 + 2xMRF455 Thank you IK6GQC Rocco Mario - First comment is about the 2xEGC3338 ... these are rarely used in original production -- which leads me to believe that someone has previously repaired. The trasnsistor specs can be found at: RF Parts www.reparts.com gb |
Motorola Application Notes written by Helge Granberg are good resources,
since most early RF designers heavily copied this design (especially since the Application notes provided schematics and PC board silk screen layouts) gb "Mario Bros" wrote in message ... Hi G.Beat, it is possible. It is for that I am trying the original schematic and for knowing also like feeding the part that polarizes the two ends transistors. Ciao IK6GQC "G.Beat" ha scritto nel messaggio news:R9p3d.72371$MQ5.36165@attbi_s52... "Mario Bros" wrote in message ... I have acquired on Ebay an amplifier HF ITT 12v 100W with written following: 600942-536-001 LPA ISSB MADE IN USA Someone knows to that apparatus belongs? It is possible to find the schematic diagram? Use one 2N4427 + 2xEGC3338 + 2xMRF455 Thank you IK6GQC Rocco Mario - First comment is about the 2xEGC3338 ... these are rarely used in original production -- which leads me to believe that someone has previously repaired. The trasnsistor specs can be found at: RF Parts www.reparts.com gb |
Hi G.Beat,
I have watched between my books and the technical notes of the Motorola but I have not found that that I try. Several schematics show only the ends transistors and some time the pre-ends transistors. I have the impression that in order to polarize the ends transistors, this board mounts 2 transistors TO220 with base-emitter connects together and connected in series between of they in place of diode . Ciao IK6GQC "G.Beat" ha scritto nel messaggio news:ykA3d.228170$mD.96361@attbi_s02... Motorola Application Notes written by Helge Granberg are good resources, since most early RF designers heavily copied this design (especially since the Application notes provided schematics and PC board silk screen layouts) gb "Mario Bros" wrote in message ... Hi G.Beat, it is possible. It is for that I am trying the original schematic and for knowing also like feeding the part that polarizes the two ends transistors. Ciao IK6GQC "G.Beat" ha scritto nel messaggio news:R9p3d.72371$MQ5.36165@attbi_s52... "Mario Bros" wrote in message ... I have acquired on Ebay an amplifier HF ITT 12v 100W with written following: 600942-536-001 LPA ISSB MADE IN USA Someone knows to that apparatus belongs? It is possible to find the schematic diagram? Use one 2N4427 + 2xEGC3338 + 2xMRF455 Thank you IK6GQC Rocco Mario - First comment is about the 2xEGC3338 ... these are rarely used in original production -- which leads me to believe that someone has previously repaired. The trasnsistor specs can be found at: RF Parts www.reparts.com gb |
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