[ARC5] BC-230 first run

[AKLDGUY .]

Dave Stinson wrote:

> Inspect the coil connection posts.  Hard to get to
> the backs of them but not impossible.  Make sure they connect
> where they should, especailly ground points.

Do you mean the wiring may have been modified by a previous
owner (no, it hasn't been modified in any way) or that the
connections are prone to going O/C with old age?

> Are the 6AQ5 screens connected to plate or grid?
> Must go to plate.

They go to plate.

> Jumper the RF Ammeter. Open thermocouple is
> another common problem.

That's easily tryable. I'll check that out when I return after lunch.

> If not any of these, I'll get my manuals and
> start scratching my head.

Thanks. I wondered whether I had overlooked some setting.

73 de Neil ZL1ANM


On 3/28/16, AKLDGUY . <neilb0627 at gmail.com> wrote:
> Leslie wrote:
>
>> If the output tank circuit was "way off" resonance I'd expect more
>> current in the plate circuit.
>> My hunch is that there is a discrepancy between the resonant frequency
>> of the grid and plate tank circuits.
>> (But the grid cct is untuned.  Only the plate circuit is tuned.)
>>
>> I would suspect corrosion in the contacts somewhere - maybe the tank
>> "C".
>> I think that's C17.  Check the wiper on the rotor for C-17
>
> Yes, my instinct was that the final tank is way off tune, but in that case
> there should be more plate current and it should be 'dippable' to 25mA
> at resonance. I'll inspect the rotor wiper, but the capacitor looks
> pristine, so not hopeful.
>
>> If you make a "loop" with a neon on it, does the neon light?
>> If you make a "sniffer coil" with a 6V or 2V incandescent globe does it
>> light?
>
> The neon loop sounds like a good idea. I may pick up a neon at Jaycar
> while out for lunch today, if they're open this holiday weekend.
>
> 73 de Neil ZL1ANM
>