[ICOM] Icom HS-15SB circuit

[Gary Fiber]

Des,

The circuit is not to hard. The small phone jack has both mic audio 
and speaker audio connected. I use the HS-10 headset with my 
IC-706MKII and the HS15SB.
The up / down buttons are standard Icom control,  Ground the U/D pin 
and the radio scans up. ground U/D through a 470 Ohm resistor and the 
radio scans down.
The PTT switch is a momentary on or a snap on. I think its a SPDT.
On many of Icom's rigs the center pin of the round 8-pin mic 
connector is speaker audio.
I do not remember any mic amplifier internally but do remember a 
adjustment pot for TX audio level.
The schematic I saw for the switch box was not very good, did not 
show any internal amplifier.
I'll try to have a look around this weekend for the HS-15SB and or a 
schematic of it.

Gary K8IZ



At 04:34 AM 2/25/2006, you wrote:
>Hello all,
>
>I am looking for details on the Icom HS-62SB or HS-15SB - this is the
>switchbox setup for the HS-62 mobile boom microphone.  I am able to get
>the mic but no control box.  I am considering making my own switchbox
>interface, but the job will be easier if someone knows the circuit of
>the Icom unit.
>
>I have not priced one of these yet from an Icom dealer here in VK but
>I'm guessing they are expensive - which also poses another problem to me
>(if they are still available!)
>
>If anyone has a copy of the circuit for this device or has experience
>with the boom mic to know what type of circuit it needs I would be
>pleased to hear from you.
>
>Or if anyone has one around for sale then that could be an option also.
>
>Contact me off the list if preferred.  Looking forward to any
>assistance.
>
>Regards,
>
>Des - VK3DMP.
>
>
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Gary Fiber K8IZ
GROL PG-19-6691
Washington State Resident