Using Other Microphones; Connecting An External Speaker - Kenwood TH-28A Instruction Manual
144 mhz fm transceiver , 430/440 mhz fm transceiver
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Also See for TH-28A:
- Service manual (78 pages) ,
- Instruction manual (65 pages) ,
- Manual (60 pages)
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4 Using other microphones
If you will not be using the SMC-33, we recommend
using an electret type microphone.
The input
impedance is 2k ohms and the DC voltage on the
microphone terminal is approximately 4 volts (Max.
3.5 mA). Do not use a dynamic microphone.
Speaker
'
Ext.
SP
Ground
fe H
Ext. MIC
4 V (Max 3.5 mA)
5 Connecting an External Speaker
59
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