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Audio in speakers during Tx
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Is it external speaker or external amplispeaker? Regards MVS Sarma ? |
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On Wed, Feb 7, 2018 at 6:18 PM, Mvs Sarma <mvssarma@...> wrote:
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D.Prabakaran? VU3DXR |
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i imagine that Prabha jee ?Pleace a 01.1uF capacitor on ech channel, at the middle pin of Violume control to ground. It would byepass the RF induced in the speaker connecting cable.Regards MVS Sarma ? On Wed, Feb 7, 2018 at 7:00 PM, Praba Karan <vu3dxr@...> wrote:
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开云体育Might try looping lead (leads?) to amp thru a ferrite, or get the split clamp on ones, close to were it goes in the amp? Wrap up in a coil any
extra length of the cable.? Makes a common mode choke. As Sarma says, maybe a 100 - 1000 pF bypass on each input? 73's Mike, WA6ISP On 2/7/2018 6:45 AM, Mvs Sarma wrote:
-- Mike Hagen, WA6ISP 10917 Bryant Street Yucaipa, Ca. 92399 (909) 918-0058 PayPal ID "MotDog@..." Mike@... |
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Mice, ?I had these experiences that old? Inveterted audio electronic telephones instruments called secraphones installed for VIPs? close to Radio Transmitters? used to misbehave.?Thu8s? I suppose that byepaasing audio at volume cotroll stage is better. ?regards ?sarma ?vu3zmv ?? Regards MVS Sarma ? On Wed, Feb 7, 2018 at 8:53 PM, Michael Hagen <motdog@...> wrote:
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开云体育Yes, it depends on
input Z of the amps.? I remember tube amps.?? I built a big
stereo in the 60's, they had Hi Z so low values worked.? I
have a great story....... My neighbors had a water heater
system with a big water holding solar panel on the roof.? When
I fired up the SB200 or 220, it cycled their water pump.? They
figured it out!?? They heard me Yelling on the Mic during a DX
Contest!? They put 2 and 2 together. I had to go on the
roof and put .1uF? on all their control switches and wiring!??
It was a perfect 20 Ant. up there. 73's Mike ? On 2/7/2018 8:44 AM, Mvs Sarma wrote:
-- Mike Hagen, WA6ISP 10917 Bryant Street Yucaipa, Ca. 92399 (909) 918-0058 PayPal ID "MotDog@..." Mike@... |
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开云体育I had the same thing using amplified computer speakers. When Iplugged in a 8 ohm speaker it cleared up. Also the 3.5 mm speaker jack has the tip and ring shorted which doesn't work well for a mono speaker. Ed On 2/7/2018 5:34 AM, Praba Karan wrote:
I am using external speakers. During Tx, it picks transmitted audio. |
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Dave Bottom
开云体育Even my Novice 75W transmitter would light the hall light at night each time I keyed the rig.Reversing the switches at each end of the hall made it non resonate on 40M. ? Probably saved some RF to be radiated too. ?LOL Dave WI6R On Feb 7, 2018, at 9:15 AM, Michael Hagen <motdog@...> wrote:
Yes, it depends on
input Z of the amps.? I remember tube amps.?? I built a big
stereo in the 60's, they had Hi Z so low values worked.? I
have a great story....... My neighbors had a water heater
system with a big water holding solar panel on the roof.? When
I fired up the SB200 or 220, it cycled their water pump.? They
figured it out!?? They heard me Yelling on the Mic during a DX
Contest!? They put 2 and 2 together. I had to go on the
roof and put .1uF? on all their control switches and wiring!??
It was a perfect 20 Ant. up there. 73's Mike ? On 2/7/2018 8:44 AM, Mvs Sarma wrote:
-- Mike Hagen, WA6ISP 10917 Bryant Street Yucaipa, Ca. 92399 (909) 918-0058 PayPal ID "MotDog@..." Mike@... |
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Perhaps we need to have a sep[erate power wired from the building input thro a metal conduit and provicde an additional emi filter for that right at the load point.. Obviously the equipment ground would be connected to that . ?? Perhaps these are general precautions even the manufacturer prescribes.? Regards MVS Sarma ? On Thu, Feb 8, 2018 at 10:23 PM, Dave Bottom <ars.kd6az@...> wrote:
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ekelley