The last pair I had have been spoken for. Nothing left but one empty and one partially populated (was used as an early test IPS for my first SlewMaster build). Those I will eventually build into complete amplifiers.
Hi Jason,
Are you planning to get more or does it feel like this is played out? I know Paulo is probably wanting to build one but I have a pair that are completed and tested that I would be willing to part with for the right price. Probably a little expensive to ship to Portugal though.
Blessings, Terry
Are you planning to get more or does it feel like this is played out? I know Paulo is probably wanting to build one but I have a pair that are completed and tested that I would be willing to part with for the right price. Probably a little expensive to ship to Portugal though.
Blessings, Terry
There hasn't been much additional interest beyond my last run of boards, just a couple of sporadic requests. I was going to hang onto those boards but got a local gent asking so I decided to part with them. I did mention a partially stuffed board and one remaining board that is untouched but I doubt he would want a board I have some parts on already.
How stuffed? 🙂 MY attempt is Complete although homeless... So far.
Summer is a tricky season for projects as life intercedes constantly .. my excuse and I'm sticking to it.
I am wanting to hear/Use! the rascals, so motivation remains strong.
IF these work well... I'd be curious re a second pair for bi amp duty.
You people seem to not only crank these builds out quickly but seemingly also do Multiple amp design builds concurrently. Amp building is clearly a Hobby
Whereas..I'm just Cheap 😱
Summer is a tricky season for projects as life intercedes constantly .. my excuse and I'm sticking to it.
I am wanting to hear/Use! the rascals, so motivation remains strong.
IF these work well... I'd be curious re a second pair for bi amp duty.
You people seem to not only crank these builds out quickly but seemingly also do Multiple amp design builds concurrently. Amp building is clearly a Hobby
Whereas..I'm just Cheap 😱
Quick guess is about 60% stuffed. Nothing in the output section is installed since it was used briefly as a test IPS when I built my first SlewMaster OPS. The other board is untouched.
He he. That is how the two extra boards I have started out. After I built some more Slew IPS boards I went ahead and finished these as full VSSA. 😀
I finally managed to get time to build a speaker protection circuit and test drove mine. Sounds great. Just a slight 60 hum but it's not in a chassis yet. Tweeters aren't quite as crisp as my Rotel but my test transformer is really sagging in voltage. Time to build a proper supply and chassis. Hopefully I can test drive a slewmaster soon too.
The Rotel seems fine. I don't know why but I've never really liked the amp though. The old Sansui it replaced was a better match with these speakers.
The bolded comment actually suprises me, the performance in the treble region for the VSSA is one of its nicer attributes. I find many other amps (usually commercial offerings) too bright sounding and are fatiguing as a result.
If you have any hum or buzz you can try removing (jumping out) the 10R in the ground loop breaker or provide a direct dedicated ground run from the input RCA to your main ground point.
The horns in my Klipcsh's like lots of voltage. My rails are sagging to 35 volts. When I was playing on the bench I noticed the hum happened as soon as the protection relays engaged (Protection not in circuit with the speakers yet). I think proper shielding will cure it. I just need to decide on a chassis. It may contain a preamp and a RuneAudio player.
I would use 20KΩ if you are just going to use passive attenuation. If your source can drive a lower impedance it you could go lower, say 10kΩ or even lower, but 20kΩ is a good value for the application.
I'd be inclined to say yes, 100k will be on the high side. If you want or need to use a higher value you might want to buffer the input. Of course, you can try the 100k unit and if you are happy then there is no problem.
I honestly have not done a detailed analysis of passive attenuation and the interaction with an amplifier's input impedance. You may be able to get away with acceptable performance from a higher value but my initial reaction says go as low as your source will comfortably accommodate.
I honestly have not done a detailed analysis of passive attenuation and the interaction with an amplifier's input impedance. You may be able to get away with acceptable performance from a higher value but my initial reaction says go as low as your source will comfortably accommodate.
Second question; when set your bias at a rail voltage of 35Vdc and after that you use 45Vdc does the bias need to be re-adjust?
Two things meanman1964:
First, after some simulation it looks like using a 100kΩ potentiometer will likely work out fine. The response is only slightly different from that of the recommended 20kΩ unit.
Second, the CCSs tend to do a good job and I have found very little variation in operating conditions when changing operating voltages. I would still double check it, but you likely won't need to adjust bias.
First, after some simulation it looks like using a 100kΩ potentiometer will likely work out fine. The response is only slightly different from that of the recommended 20kΩ unit.
Second, the CCSs tend to do a good job and I have found very little variation in operating conditions when changing operating voltages. I would still double check it, but you likely won't need to adjust bias.
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