Electro Voice 638 *FAIL*

Tonight was bored and tried to wire up a impedance transformer into an old Electro Voice 638 50K ohm hi-Z microphone, while I got it physically inside without having to damage anything, the dang thing just does not work so good on the air, need to investigate further!

Uniden 2830 repaired

Earlier on in the year I took my Uniden 2830 out and plugged it in, No audio, confirmed the audio ic was fine and the main IC was opening squelch etc etc changed a few capacitors in the audio section and nothing, anyway I got busy with other stuff and the 2830 was left, yesterday evening 10 meters opened up briefly with sporadic E propagation into Southern UK and North Europe, well this spurred me on and last night I revisited the circit diagram for the 2830, this morning I plonked it back down on the desk, replaced a capacitor that may have been holding the squelch, bang hey prestor the 2830 is working!
Looking forward to working a few Sp. Es on it.

I've had this radio since I was around 13 years old, so its nice to see the old girl going again.





A while back I obtained a Turner 22X microphone head casing, It had been painted badly, anyway it polished up good, but was still useless as it had no internals, So! today I put a Heil HC-5 microphone element into the old beast, and mated the head up with an Electro Voice PTT microphone stand.






Quite a productive day Ham radio wise :-)

Oops

Seems I've let my blog die, well I've been off the air, busy with other stuff, good stuff coming soon............. !