I don't get it, no wonder I'm going grey/bald.
Bins for all the procrastinating, f-----g around just spend the lousy $9 and get a ready made item with all the charge lights, leads & charger .
12V Lithium-ion Li-ion Rechargeable Battery for CCTV - eBay (item 380219619869 end time May-03-10 21:00:17 PDT)
It's going to cost your more than that for the components, case & battery, then factor in you labour and my loss of hair and sanity.
Cheers George
Bins for all the procrastinating, f-----g around just spend the lousy $9 and get a ready made item with all the charge lights, leads & charger .
12V Lithium-ion Li-ion Rechargeable Battery for CCTV - eBay (item 380219619869 end time May-03-10 21:00:17 PDT)
It's going to cost your more than that for the components, case & battery, then factor in you labour and my loss of hair and sanity.
Cheers George
http://cgi.ebay.com/12V-Lithium-ion...emQQptZLH_DefaultDomain_0?hash=item5886dafa1d
Sam Telling uses this with his Lightspeed he bought from me, and his comment is just like mine that there is a difference between it (Lithium-Ion battery) and the standard 12v linear regulated wall-wart but it's so close he cannot comment on what the difference is or does. He says both are dead silent but there is a detectable difference.
If you do a ebay search for this " 12v Li-ion battery " you will find many sellers selling this exact one, some even cheaper and some with free postage. The charger is universal mains 100vac-250vac and they "some" even supply the correct mains socket adapter for your country wall outlet.
All the leads are the correct ones for my production Lightspeed Attenuator, being 2.1mm and center pin positive, so those who have my Lightspeed Attenuator can safely purchase this same battery charger setup. If any other model, your on your own. I had one nucklehead connect a motor cycle battery around the wrong way and he totaled his Lightspeed.
And there are many seller to chose from, I just posted the one I use when people purchase a production Lightspeed Attenuator from me as an alternative power source.
Cheers George
Sam Telling uses this with his Lightspeed he bought from me, and his comment is just like mine that there is a difference between it (Lithium-Ion battery) and the standard 12v linear regulated wall-wart but it's so close he cannot comment on what the difference is or does. He says both are dead silent but there is a detectable difference.
If you do a ebay search for this " 12v Li-ion battery " you will find many sellers selling this exact one, some even cheaper and some with free postage. The charger is universal mains 100vac-250vac and they "some" even supply the correct mains socket adapter for your country wall outlet.
All the leads are the correct ones for my production Lightspeed Attenuator, being 2.1mm and center pin positive, so those who have my Lightspeed Attenuator can safely purchase this same battery charger setup. If any other model, your on your own. I had one nucklehead connect a motor cycle battery around the wrong way and he totaled his Lightspeed.
And there are many seller to chose from, I just posted the one I use when people purchase a production Lightspeed Attenuator from me as an alternative power source.
Cheers George
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You've got that around the wrong way, should be "is the phono able to drive the Lightspeed"
The answer is, depends on the output impedance of the Phono stage.
If below say 200ohms then yes it can, but if the level is too low then it does not have enough voltage output, the fix is to get a higher output cartidge or get a stepup device, either solid state or transformer, or you could try to increase the gain of the phono stage itself.
Cheers George
The answer is, depends on the output impedance of the Phono stage.
If below say 200ohms then yes it can, but if the level is too low then it does not have enough voltage output, the fix is to get a higher output cartidge or get a stepup device, either solid state or transformer, or you could try to increase the gain of the phono stage itself.
Cheers George
Hi,
Ok. I prefer to use transformers over solid state/tube. I have another thought (May be crazy...). Can we use an audio transformer instead of tube/solid state buffer for providing impedance matching ? Let me know your opinion/suggestions.
Best regards,
Bins.
Ok. I prefer to use transformers over solid state/tube. I have another thought (May be crazy...). Can we use an audio transformer instead of tube/solid state buffer for providing impedance matching ? Let me know your opinion/suggestions.
Best regards,
Bins.
You still need your phono stage to do RIAA. The step transformer is just to get the cartridge output voltage level higher if too low.
Just post a schematic of your phono stage to see if it has low enough output impedamce and secondly to see if the gain can be increased.
Cheers George
Just post a schematic of your phono stage to see if it has low enough output impedamce and secondly to see if the gain can be increased.
Cheers George
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Hi Uriah,
I will have to check... Will adding a buffer change the light speed characteristics ? What is the recommended buffer type for light speed ? Please suggest.
Best regards,
Bins.
I will have to check... Will adding a buffer change the light speed characteristics ? What is the recommended buffer type for light speed ? Please suggest.
Best regards,
Bins.
Hi Uriah,
"The buffer giveth and the buffer also taketh away".... Seems interesting. I would like to know more on "giveth " point from your experience as the other one is expected with the added components.
Best regards,
Bins.
"The buffer giveth and the buffer also taketh away".... Seems interesting. I would like to know more on "giveth " point from your experience as the other one is expected with the added components.
Best regards,
Bins.
It helps with bass response. Thats about it from my point of view. Wider soundstage to but less depth is the worst of the taketh's. 3D imaging of female voices seems to collapse.
George recommends a tube buffer circuit that I have not tried and he recommends it with a caveat of 'no buffer is the best buffer.'
Honestly, getting this thing to work best with your system is way better than putting a buffer bandaid on it.
George recommends a tube buffer circuit that I have not tried and he recommends it with a caveat of 'no buffer is the best buffer.'
Honestly, getting this thing to work best with your system is way better than putting a buffer bandaid on it.
Hi,
The light speed is working fine for me and I am pretty satisfied with it's performance. But, I would like to try out a buffer unit with it and would like to know how it performs. The only thing is that I would like to know all your opinion before sticking to a particular buffer (Fewer components the better).
What I felt when listening to a tubed buffer is that the frequencies got a bit
polished. I am not sure on how it will be in solid state buffers. The light speed output is the purest form and is having no added color. The staging, dynamics, channel separation etc is better than DACT/other passive attenuators I had listened to.
Best regards,
Bins.
The light speed is working fine for me and I am pretty satisfied with it's performance. But, I would like to try out a buffer unit with it and would like to know how it performs. The only thing is that I would like to know all your opinion before sticking to a particular buffer (Fewer components the better).
What I felt when listening to a tubed buffer is that the frequencies got a bit
polished. I am not sure on how it will be in solid state buffers. The light speed output is the purest form and is having no added color. The staging, dynamics, channel separation etc is better than DACT/other passive attenuators I had listened to.
Best regards,
Bins.
Lightning Thief!
After about 3 years of having LDRs in my parts bin, I went ahead and built one. Of the 12 LDRs 4 matched pairs came off it. I used them as matched series and matched shunts. Except for the LDRs, Dales/Panasonic resistors and Bourns trimmer all other parts are from Radioshack. The power source is 9V batt thru an LM317 voltage reg adjusted to 5.5V. At this voltage the Resistance varies from about 55R to about 30k. This should work well in replacement of the B1 buffer's volume control for amps with low input impedance. I'll recommend the LS at the B1 thread. The LM317's Vout should be adjusted without the LS and then when it is connected to compensate for loading effects. The battery is at 9.28V from 9.35V after 3 hours of listening last night. More in parallel for longer life.
The sound is clean, crisp, detailed and not fatiguing. No hiss or hum on 89dB speakers. And the volume control is at 12 for my normal listening levels. I love it!
After about 3 years of having LDRs in my parts bin, I went ahead and built one. Of the 12 LDRs 4 matched pairs came off it. I used them as matched series and matched shunts. Except for the LDRs, Dales/Panasonic resistors and Bourns trimmer all other parts are from Radioshack. The power source is 9V batt thru an LM317 voltage reg adjusted to 5.5V. At this voltage the Resistance varies from about 55R to about 30k. This should work well in replacement of the B1 buffer's volume control for amps with low input impedance. I'll recommend the LS at the B1 thread. The LM317's Vout should be adjusted without the LS and then when it is connected to compensate for loading effects. The battery is at 9.28V from 9.35V after 3 hours of listening last night. More in parallel for longer life.
The sound is clean, crisp, detailed and not fatiguing. No hiss or hum on 89dB speakers. And the volume control is at 12 for my normal listening levels. I love it!
