PH508 (Power Horn)

[dave w]

Yeah, but if the new horns are not as loud as the old horns, you can bet X10 is trying to save a penny somewhere.   

[Brian H]

Well I am going to try a rough sound test.
No Sound Meter just compare with a scope. Signal from a computer style microphone with a new and old one.

[Brian H]

Test of PH508 audio levels.

Altec Lansing ABM-100 Stereo Computer Microphone.

Heathkit IO-4540 Scope.
1X Probe.

Breadboard bias circuit for microphone. Using 2 AA batteries and 2.2K resistors.

Old 02H35 Hi Tone:  .275V PP
              Low Tone: .200V PP
New 09A03 Hi Tone:  .125V PP
                Low Tone: .100V PP
New 10F25 Hi Tone:  .075V PP
                Low Tone: .100V PP

Side note:
The XTB-IIRs signal was seen during triggering.
On the scope trace. Must have been radiating from the PH508s power transformer.

[vlong]

Test of PH508 audio levels.

Altec Lansing ABM-100 Stereo Computer Microphone.

Heathkit IO-4540 Scope.
1X Probe.

Breadboard bias circuit for microphone. Using 2 AA batteries and 2.2K resistors.

Old 02H35 Hi Tone:  .275V PP
              Low Tone: .200V PP
New 09A03 Hi Tone:  .125V PP
                Low Tone: .100V PP
New 10F25 Hi Tone:  .075V PP
                Low Tone: .100V PP

Side note:
The XTB-IIRs signal was seen during triggering.
On the scope trace. Must have been radiating from the PH508s power transformer.

looks like the older unit louder then new one not  sure why they keep on changing.

[Brian H]

Many of the X10 modules are slowly being revised to use more modern components.
Many of the components in the older ones are obsolete or almost impassible to find.
The redesign with different parts changed things.