[Boatanchors] My Homebrewed Regen Receiver project, link to pictures

[Phil]

Hi Ray,
Well, they didn't have those two items in the '30s, but they were used 
as a matter of convenience, and it's what I had.  The performance would 
have been the same if I'd used octal (or older) tube equivalents.  If 
I'd had an old Alnico speaker I'd have used it, but this one I had.

When I was designing/building the receiver and was getting advice from 
the Regen receiver group, I even questioned the authenticity of the 
resonant LC audio filters I designed (not if the specific parts I used 
were authentic, but the concept).  I was told "yes it was", that many 
high performance Ham stations of the day used resonant LC audio filters, 
sometimes using an old Auto spark coil for the inductor.

That was my basic criterion for '30s technology, not if more modern 
component equivalent parts were used.  Otherwise I couldn't have used 
modern film resistors, and would have had to use old wax paper 
capacitors and oil filled filter caps. . .

73 From "The Beaconeer's Lair"
Phil, KO6BB
http://www.qsl.net/ko6bb/  (Web Page)

PRESENT RADIOS:
Grundigs: S-350 (~2006), G6 (2011) & S450DLX (2014).
HOMEBREW: 7 Tube+Rect 1v3 Regenerative RX for LF (built 2015)
Icom:    IC-735 Transceiver (~1990).
Icom:    R-75, Cascaded 250/125Hz CW-Filt, Panadapter. (~2005)
Icom:    IC-7200 Transceiver (~2015).
R-Shack: DX-380 digital portable (~1990).
SDR:     Softrock Ensemble II LF (built from a kit 2015).
Zenith:  Royal-7000 Transoceanic Portable (~1968).

ACCESSORIES: HOMEBREW LF-MF Pre-Amp, MFJ-993B HF Auto-Tuner.
              HOMEBREW 8 Hz Audio Filter.

ANTENNAS:  88 foot Long Ladder-line fed dipole, 35 feet AGL for MW/SW.
            Active Mini-Whip, 36 Feet AGL for LF/MW/SW.
            37 foot "Low Noise Vertical", 11 feet AGL for LF/MW/SW.

Merced, Central California, 37, 18, 37N   120, 30, 6W CM97rh

On 2/12/2016 8:45 PM, Ray, W4BYG wrote:
> Great project and congratulations on getting it going.  But I question 
> the ready availability in the 30's of the miniature tubes and the 
> ceramic magnet speaker.
>
> Ray, W4BYG