🙂
Here's a pic of some 866A's I recently tested, I found the sound fruity with an oaky timbre yet with a hint of nutmeg. Reminded me of Prague in the Winter of 56, harsh, but realistic with over tones of violent oppression.
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I thought that 866A tubes made the sound of glass clinking as they warmed up, and clink again as they cool right after powering down.
An AM radio has a terrible hash sound if it is placed near an operating 866A.
Simon and Garfunkel did not really understand, they only knew "The Sounds of Silence".
An AM radio has a terrible hash sound if it is placed near an operating 866A.
Simon and Garfunkel did not really understand, they only knew "The Sounds of Silence".
An AM radio has a hash/60 (or 50) Hz buzz to it at almost all times, too. It's completely useless to me in urban Toronto. The entire dial is hum and noise in the apartment, and the car is more buzz/noise than program. I tried to listen to a Raptors game on the way home from bowling but it was virtually unlistenable. And that's clear channel AM with 50kW of power.
kodabmx,
Sorry all the interference throughout your area.
I have a brand name solid state phono preamp that came with a wall mounted switcher 18VDC supply.
That switcher throws so much broadband hash onto the power line, that it goes to my houses Main Power Panel, and then re-distributes that hash throughout the house wiring.
No AM radio, neither plug-in, nor battery powered is listenable anywhere in the house (but the phono preamp works well; and I unplug the switcher when not listening to records).
I have another phono preamp with a wall mounted power supply (transformer, rectifier, and capacitors). There is no AM radio interference.
Successful design; and the phono preamp is not noisy either.
EMI: Electromagnetic interference. Devices have to pass emission and susceptibility standards.
EMC: Electromagnetic Compatibility. That is an Oxymoron.
Just because devices that pass EME tests emit less than a standard level, and devices pass that have EMI susceptibility below the standard level . . . that does not mean they will not interfere with each other.
Sorry all the interference throughout your area.
I have a brand name solid state phono preamp that came with a wall mounted switcher 18VDC supply.
That switcher throws so much broadband hash onto the power line, that it goes to my houses Main Power Panel, and then re-distributes that hash throughout the house wiring.
No AM radio, neither plug-in, nor battery powered is listenable anywhere in the house (but the phono preamp works well; and I unplug the switcher when not listening to records).
I have another phono preamp with a wall mounted power supply (transformer, rectifier, and capacitors). There is no AM radio interference.
Successful design; and the phono preamp is not noisy either.
EMI: Electromagnetic interference. Devices have to pass emission and susceptibility standards.
EMC: Electromagnetic Compatibility. That is an Oxymoron.
Just because devices that pass EME tests emit less than a standard level, and devices pass that have EMI susceptibility below the standard level . . . that does not mean they will not interfere with each other.
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I had the same problem with interference on the 40 meter ham band. Turned out the noise was from a switching trickle charger on my car out in the garage.
The charger came from a nationwide (US) discount tool company which shall remain nameless. I replaced it with a well known brand that has been around for a long time. Problem solved.
The charger came from a nationwide (US) discount tool company which shall remain nameless. I replaced it with a well known brand that has been around for a long time. Problem solved.