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SR-150 Injection Voltage

edward schumacher All Messages By This Member #29949 This question mainly for Walt. Finally starting on the first of two radios here and question the voltage reading for V6. The original manual only calls for 7 volts but in your instructions, Walt, you call for peaking T4 for a 30V level. The initial reading on this rig was about 11-12 volts with my Boonton rf meter and frequencies were both dead on. So far so good. Next tested peaking T4 and could indeed get to 30V easily with a slight roll off to the correct side. Now wondering which is the level I need? Been a long time since I studied product detector theory and don't remember if the higher oscillator injection voltage was required. Can you clarify for me? TNX es 73 ... Ed, WA9GQK
waltcates All Messages By This Member #29950 开云体育 See red below Walt Cates, WD0GOF ? A majority of acceptance is not proof of correctness. toggle quoted message Show quoted text From:[email protected] <[email protected]> on behalf of edward schumacher <eddiewa9gqk@...> Sent:?Tuesday, April 9, 2024 1:05 PM To:[email protected] <[email protected]> Subject:?[HallicraftersRadios] SR-150 Injection Voltage ? This question mainly for Walt. Finally starting on the first of two radios here and question the voltage reading for V6. The original manual only calls for 7 volts but in your instructions, Walt, you call for peaking T4 for a 30V level. The 7v in the manual is rms that equals 19.8vpp The initial reading on this rig was about 11-12 volts with my Boonton rf meter and frequencies were both dead on. So far so good. Next tested peaking T4 and could indeed get to 30V easily with a slight roll off to the correct side.?Here again the Boonton is measuring rms. 11vrms = 30.8vpp Now wondering which is the level I need? Been a long time since I studied product detector theory and don't remember if the higher oscillator injection voltage was required. Can you clarify for me? TNX es 73 ... Ed, WA9GQK
edward schumacher All Messages By This Member #29951 Thanks, Walt. Will go back and verify what I am measuring and it looks like this stage is working properly. Next on to the mixer xtals, etc.. Right now the radio is mute but have not started any tracing. It was rescued from a house fire where it did not get damaged directly but was in a fume environment apparently so probably needs detailed contact cleaning.. Looks deceptively clean but we know how that can go. 73 ... Ed On Tuesday, April 9, 2024 at 05:57:47 PM CDT, waltcates <cateswa@...> wrote: See red below Walt Cates, WD0GOF ? A majority of acceptance is not proof of correctness. toggle quoted message Show quoted text From:[email protected] <[email protected]> on behalf of edward schumacher <eddiewa9gqk@...> Sent:?Tuesday, April 9, 2024 1:05 PM To:[email protected] <[email protected]> Subject:?[HallicraftersRadios] SR-150 Injection Voltage ? This question mainly for Walt. Finally starting on the first of two radios here and question the voltage reading for V6. The original manual only calls for 7 volts but in your instructions, Walt, you call for peaking T4 for a 30V level. The 7v in the manual is rms that equals 19.8vpp The initial reading on this rig was about 11-12 volts with my Boonton rf meter and frequencies were both dead on. So far so good. Next tested peaking T4 and could indeed get to 30V easily with a slight roll off to the correct side.?Here again the Boonton is measuring rms. 11vrms = 30.8vpp Now wondering which is the level I need? Been a long time since I studied product detector theory and don't remember if the higher oscillator injection voltage was required. Can you clarify for me? TNX es 73 ... Ed, WA9GQK
waltcates All Messages By This Member #29953 开云体育 OK, good luck with it. 73 Walt Cates, WD0GOF ? A majority of acceptance is not proof of correctness. toggle quoted message Show quoted text From:[email protected] <[email protected]> on behalf of edward schumacher <eddiewa9gqk@...> Sent:?Tuesday, April 9, 2024 6:41 PM To:[email protected] <[email protected]> Subject:?Re: [HallicraftersRadios] SR-150 Injection Voltage ? Thanks, Walt. Will go back and verify what I am measuring and it looks like this stage is working properly. Next on to the mixer xtals, etc..

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