Astatic made another model the C-104 with a ceramic element. Very similar except the output is about 10db lower. This is for the element alone. If there is an amplifier the output levels are probably the same. I have not searched for a data sheet on the C-104.
Astatic made ceramic versions of many of their crystal mics and crystal phono pickups. The ceramic has the advantage of not being vulnerable to heat or moisture.
toggle quoted message
Show quoted text
On 2/23/2024 8:51 AM, Jim Shorney wrote:
My "secret" is to do away with the amplifier and replace it with a series 470K resistor. This is actually an old-timer's trick to mellow out the frequency response of the D-104 head. The amplifier is enhanced uselessness for our radios. It will happily drive just about any radio this way and you get rid of a failure point (actually two if you consider potential battery leakage). This works with any T-UGxx stand.
My understanding is that later D-104 heads used a ceramic cartridge. The same fix applies. The D-104 head likes to see a high impedance load, the higher the better.
I have three T-UGxx variants that I have done this to and tested on the air with good reports. And they can be used with VOX.
73
-Jim
NU0C
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
