[Hammarlund] HQ-170 audio

[Patrick]

There's a failure mode in the IF cans where the internal mica caps short 
out. A symptom is loud crashing or static noises. It's something of a 
pain to replace these caps but it is possible.

Pat
wa4tuk



On 2/20/2011 6:35 PM, RAY FRIESS wrote:
> The microphonics are still present even with the volume control all the way down.
> The noise (static like crashes) decrease with the volume control all the way, down but are still present, just barely though.
> By microphonics, I mean that when I tap the cabinet or front panel, you can hear the coming through the audio section.
> Before the noise started in the audio section, it was not present.
>
> I have had the receiver gone completely through by an expert in Hammarlund receivers.  When he sent it back after going through it,
> he said it was as close to factor specs as he had ever been able to get a receiver of its age to.
>
> Ray
>
>