[Hammarlund] Drift of Newer Hammarlunds? was Re: Old Hammarlunds

[Darrell Bellerive]

A brochure or ad for the HQ-145A
(http://www.hammarlund.info/info/hq-145/hq-145a-ax/hq-145a-ax-4.jpg)
also lists the filament transformer as an option. Wonder how many
actually had this option? Or the noise immunizer?

For some reason, I just really like the HQ-145AC. Perhaps someday I will
have the money to purchase a really nice one with all the options. Until
then the pictures help....

Darrell Bellerive
Amateur Radio Station VA7TO

On 05/08/11 08:20, Glen Zook wrote:
> The later versions of the HQ-170 and HQ-180 added a separate
> filament transformer which bypassed the off/on switch which
> kept the tunable oscillator tube heater activated so long
> as the receiver was connected to the AC line.  This did help
> somewhat in the stabilization of the receiver.