Thanks,

Dave
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: : : : : : : : : : : :Sir David . . . . . : : :Looking at the two initial aspects of the unit . . the power supply . . . the AF processing circuitry. :The power supply seems to be fine, its only slight variance, from specified being the AF output stages loading factor. :Now as for the audio section, the Q7 transistor seems to be turned on a bit too hard, but I would expect the whole circuitry to pass an audio signal thru the speaker. :Its biasing is being a derived voltage divider sampling from the string of resistors in the Q9 emitter circuitry to ground. as tha current consumprion of the output stage varies, so does the bias. :You mentioned that the sets Q7-Q8 also got changed . . . why ? (Q-1 ?) and what parts did you use,(Q-2 ?) and no error was made in miswiring the CBE connections ?, in the case of there being a mechanically different basing arrangement was there ? :Also back to day . . . . one did you ever do the bodily induced Hummmm injection to the high /top of the volume control.(Q-3 ?) :Now mind you that this SS circuitry is a current driven technology versus the voltage variant effect of tube based equipment, and the low Z input impedance is not going to be as impressive as the test is demonstrating when using tube type circuitry. :Buuuuuuuut . . . . the long string of direct coupled Q7-8-9 circuity should give a bit of a buzzzz to at least let us know that the audio circuitry stage is functioning. :When confirmed that the set is amplifying audio . . . we can then move on to the frontal RF stages. :BTW another test alternative would be to use a test lead with clips on both ends and connect one clip to the collector line of the output stage and the end of the clip lead to an .05---.1---.47 ufd . . . . (whatcha' got ?) . . . capacitor and the caps then free lead gets alternativly connected to Q7 or Q8's base lead. One should give you " squeak and squawk " city from the sets speaker. :Waiting for responses to questions Q1-3 . . . and your results. : : : : :73's de Edd : : : : :A boiled egg is . . . hard to beat. : : : : : : :

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:Place responses just after this line :
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: : : : : : : : : : : :Sir David . . . . . : : : Don't have time to redraw a schematic at this time. :BUT the main B+ from the output filamants of the rectifier is dropped thru R4 16k and then gets filtered ? bypassed/decoupled with that Ci6 to ground and that line passes on to feed two screen supplies of tubes and one plate supply. :Threr is also an 8k droppping resistopr that keeps the cathodes at a highr than normal value intil the volume control sghunts it to ground and starts decreasing that voltage. :It gives a wider dynamic range on the volume control that way. : : : : :73's de Edd : : : : : If the world were a logical place, men would ride horses sidesaddle. : : : : : : :

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::Hello All,
:: I'm having trouble seeing where the green wire from C-16 goes. I know where it connects to R1 but I need to disconnect the green wire, wherever that is. Once I have that I can try to test this radio.
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::Thanks,
::
::Dave
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