[ARC5] SCR-274N side tone level?
Bill Cromwell
wrcromwell at gmail.com
Sat Feb 9 12:03:00 EST 2019
Hi,
Listening to your TX signal is an advantage of using separate tx and RX.
That's what I prefer. I do have a transceiver (not mil) that came with
an overpowering CW sidetone. I immediately inserted the resistor Mike
has mentioned here. I was able to put the resistor in line with the
sidetone into the audio amp. I made mine adjustable - set and forget.
Apparently Dave has several choices now. Choose your poison Dave and enjoy.
73,
Bill KU8H
On 2/9/19 11:49 AM, Michael Hanz wrote:
> Table 8 in the manual says the sidetone voltage on CW is 7-9 volts into
> 4,000 ohms. Are you using low impedance earphones? If you are, you
> might try an MC-385* headset adapter to lower the volume. Or, you might
> check to see if you have a low impedance tap on the sidetone
> transformer, T-50, in your modulator. Here's the note on the tap:
>
>
>
> Or, you could just put an appropriate resistor in series with the jack
> to your headphones...:-)
>
> - Mike KC4TOS
>
> On 2/9/2019 10:52 AM, Dave Kirk via ARC5 wrote:
>> I run a stock SCR-274N setup with a BC-456 modulator not sure if this
>> is normal, but the side tone in CW, and phone is ear piercing I can't
>> even wear my headphones its so loud. Is there a simple way to lower
>> the level? So far I haven't seen in the manual any mention of level
>> adjustment. Guess I understand why its loud the radio dude needed to
>> be able to hear the radio during flight, but dang this is ridiculous.
>>
>> Dave
>
>
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: https://www.qsl.net/donate.html
> Message delivered to wrcromwell at gmail.com
>
--
bark less - wag more
More information about the ARC5
mailing list