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BeePre / Re: HUM With Bee Pre & Kaiju
« Last post by Doc B. on Today at 05:58:43 AM »That's a ground issue. Make sure that the Kaiju, BeePre and your source components are plugged into the same outlet/circuit.
Recent Posts
22
MonAmour / Re: Damping Factor
« Last post by Paul Joppa on Today at 05:45:52 AM »Yes, the effect works the same when driving a 16-ohm speaker from the 8-ohm wiring, or driving an 8 ohm speaker from the 4-ohm wiring, or driving a 4-ohm speaker from the 2-ohm wiring.
These are the main effects. There will be some minor changes in the extreme frequency response of the output transformer. I'd have to run the design calculations to be sure, but in general there will be more extended highs and less extended bass. I doubt either would be audible. The vagaries of speaker impedance in the deepest bass and highest treble are probably bigger than these effects.
Incidentally, many transformers have (slightly) inferior response at the lower impedance taps. That's not the case with the OT-2 or the OT-5 used in the Kaiju and the MonAmour. That's the reason these transformers don't have simple impedance taps but require re-wiring to change the load impedance.
These are the main effects. There will be some minor changes in the extreme frequency response of the output transformer. I'd have to run the design calculations to be sure, but in general there will be more extended highs and less extended bass. I doubt either would be audible. The vagaries of speaker impedance in the deepest bass and highest treble are probably bigger than these effects.
Incidentally, many transformers have (slightly) inferior response at the lower impedance taps. That's not the case with the OT-2 or the OT-5 used in the Kaiju and the MonAmour. That's the reason these transformers don't have simple impedance taps but require re-wiring to change the load impedance.
23
BeePre / Re: Resistance Check on 52
« Last post by Emoreigns on Today at 05:06:41 AM »I crimped those resistors down as best as possible- Still not getting a proper reading… still not reading at 4000, and coming in at 25.0 on 40000 ohm setting. My readings seem steady elsewhere.
24
MonAmour / Re: Damping Factor
« Last post by Gerry E. on Today at 04:59:08 AM »Yes, you will nearly double the damping factor by using the 8 ohm output to drive a 16 ohm speaker.
You will also get about 80% as much power, and about half the distortion.
Hi PJ:
Do those damping factor, power and distortion figures hold true when running 8-ohm speakers from a 4-ohm tap? If yes, any other potential downsides, other than the approx. 20% reduction in power, when configured like this? Thanks!
Gerry
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MonAmour / Re: Damping Factor
« Last post by Altecboy on Today at 12:24:24 AM »BTW, is there a spec on the what the damping factor of the Monamour is?
thanks.
thanks.
27
Stereomour II / Re: Stereomour II mods
« Last post by hmbscott on Yesterday at 07:11:08 PM »Night Shot.
28
Crack / Re: Low voltage on T7 & T9 during transformer secondary test
« Last post by Paul Joppa on Yesterday at 06:26:50 PM »Just checking to be clear - you said "...only 3.37V AC across T7 and T9," which is somewhat ambiguous. You should get 6.6 volts with one probe on T7 and the other on T9. T8 is the centertap, which is grounded to safety ground (the chassis), so if one probe is grounded and the other is on T7 or on T9, you will get 3.3VAC.
29
Crack / Re: Low voltage on T7 & T9 during transformer secondary test
« Last post by 2wo on Yesterday at 05:38:59 PM »Try a fresh battery in your meter... John
30
BeePre / HUM With Bee Pre & Kaiju
« Last post by hpleung on Yesterday at 12:35:56 PM »Hi,
So I am getting quite a lot of Hum with my newly built Bee Pre1. Any suggestion on how to get the hum to go down?
The music sounds great but the hum exists.
I did the following experiment:
1. I turn off the Bee Pre
2. I turn on the Kaiju with the Bee Pre connected ==> HUM Exist
3. I disconnect the Bee Pre from the Kaiju and the Hum goes away.
I also tried a solid state Pre Amp with the Kaiju and there is no HUM either.
Let me know if you have any ideas.
So I am getting quite a lot of Hum with my newly built Bee Pre1. Any suggestion on how to get the hum to go down?
The music sounds great but the hum exists.
I did the following experiment:
1. I turn off the Bee Pre
2. I turn on the Kaiju with the Bee Pre connected ==> HUM Exist
3. I disconnect the Bee Pre from the Kaiju and the Hum goes away.
I also tried a solid state Pre Amp with the Kaiju and there is no HUM either.
Let me know if you have any ideas.