VSSA Through-Hole Version by Jason

[Ranchu32]

I've had my eye on the SMPS500R also. It appears to be good value and only a few dollars more than the SMPS300RE. Is there any substantial difference between the two aside from the power rating?

 

[still4given]

Hi Ranchu,

It is the SMPS300RE. I bought it directly from Connex but in the future I will buy it from the folks at the link I provided. The shipping is half as much and much quicker since they are in Oregon. For those in other countries that may not be the case. The output is adjustable from +-34.6vdc to +-38.6vdc. I also hooked it up to my Variac and the voltage stayed constant whether the input was 110Vac or 122Vac. I'm pretty impressed. I measured about 1.2mVac at the output. Pretty low ripple.

Hi Jason,

Yeah, the 500R puts out 500w. I guess with class A you may need that much but I played the Symasym hard today and that PSU didn't even break a sweat. The 500R is $20 more too. Looking forward to your impression of the bigger unit.

Blessings, Terry

 

[still4given]

A word of warning. Don't touch the top of those two big caps at the same time while it is on. After the jolt................. I measured the voltage. 160VAC across the the tops of those two caps.

 

[Ranchu32]

Thanks for the tip Terry. The shipping from Hifimediy is half of what Connex charge!

 

[triplej]

Goods arrived and look very good thanks Jason.

8 days door to door including one public holiday here in Auz yesterday.

 

[quan]

Got mine today too. Many thanks Jason. They are lovely boards indeed.
Quan

 

[jkuetemann]

Another update...

I'm impressed at how quick delivery to Australia was, I expected longer. Just a few more to go...

still4given - 2 - Delivered
ivanlukic - 2 - Shipped
quan - 2 - Delivered
triplej - 2 - Delivered
baswamin - 2 - Shipped
potepuh - 2 - Shipped
spind - 2 - Delivered
brianco - 2 - Delivered
Sheldon - 2 - Delivered

Here's hoping some of you guys get a chance to build these up shortly. I would like to get some feedback regarding layout and things like ease of construction and set-up. My goal will be to evolve this and place a new order when some 'massaging' has been done. Any constructive suggestions welcomed and will be taken into consideration.

 

[freeman]

Hi Ranchu,

It is the SMPS300RE. I bought it directly from Connex but in the future I will buy it from the folks at the link I provided. The shipping is half as much and much quicker since they are in Oregon. For those in other countries that may not be the case. The output is adjustable from +-34.6vdc to +-38.6vdc. I also hooked it up to my Variac and the voltage stayed constant whether the input was 110Vac or 122Vac. I'm pretty impressed. I measured about 1.2mVac at the output. Pretty low ripple.

Hi Jason,

Yeah, the 500R puts out 500w. I guess with class A you may need that much but I played the Symasym hard today and that PSU didn't even break a sweat. The 500R is $20 more too. Looking forward to your impression of the bigger unit.

Blessings, Terry

Hi Terry,

Have you compared the smps directly with the cap multiplier psu? Thanks.

 

[baswamin]

Jason,

Received boards today, thanks a lot for your effort.

I will be building this a little later as my other projects are pending.

Thanks

 

[still4given]

Hi Terry,

Have you compared the smps directly with the cap multiplier psu? Thanks.

Hi freeman,

I have not tried them side by side. As soon as I finish these boards of Jason's I will be able to test this amp side by side with Pete's which has the Cap multiplier. I should probably learn what to measure for. I just listen.

 

[freeman]

Thanks, Terry. Do you think two of the smps300's (one per channel as in LC's configuration) is overkill? Can't wait to try these out.

 

[jkuetemann]

Terry,

One of the reasons I went with the SMPS500R is to support multiple channels off one PSU. I'm seriously thinking I'd like to do a 5 channel HT amplifier loaded with VSSAs and wanted more flexibility with the configuration.

----------

freeman,

Personally I'd think one SMPS300RE per pair of channels is likely fine, though there is no harm in separate PSUs if your wallet will stand it 😉.

 

[quan]

Hi Jason. I am thinking of HT amp using VSSAs modules as well but will probably using linear Psu instead.
Quan

 

[jkuetemann]

Hi Jason. I am thinking of HT amp using VSSAs modules as well but will probably using linear Psu instead.
Quan

A regular linear supply should be fine, just be reasonably generous with the filter capacitance and consider CRC to keep ripple lower. You might consider a capacitance multiplier if you want a really clean supply without using an SMPS or linear regulation.

 

[jkuetemann]

On the home stretch...

Just two more to go, hopefully these arrive shortly.

still4given - 2 - Delivered
ivanlukic - 2 - Shipped
quan - 2 - Delivered
triplej - 2 - Delivered
baswamin - 2 - Delivered
potepuh - 2 - Shipped
spind - 2 - Delivered
brianco - 2 - Delivered
Sheldon - 2 - Delivered

 

[ivanlukic]

PCBs arrived this morning! Canadian Postal Services work fine.

 

[quan]

A regular linear supply should be fine, just be reasonably generous with the filter capacitance and consider CRC to keep ripple lower. You might consider a capacitance multiplier if you want a really clean supply without using an SMPS or linear regulation.

Yeah CM would be good. May be with the next GB.
Quan

 

[jkuetemann]

I'd like to do my own version of the capacitance multiplier, similar to the MrEvil / PMI one but using BJTs + MOSFET pass transistors. When I return to that I'll do some show and tell here as well.

 

[jkuetemann]

Almost completely fulfilled...

Awesome! Just one more to go...

still4given - 2 - Delivered
ivanlukic - 2 - Delivered
quan - 2 - Delivered
triplej - 2 - Delivered
baswamin - 2 - Delivered
potepuh - 2 - Shipped
spind - 2 - Delivered
brianco - 2 - Delivered
Sheldon - 2 - Delivered

 

[brianco]

You have done very well Jason. Thank you, and I am looking forward to your PS proposals.