pp output transformer miniblok2

chopchip · 10th August 2010, 12:45 AM

is this a good pp output transformer for the miniblok2 amp?

1 PP push-pull 10K 10Watt output transformer 4 VT-25 10 on eBay.ca (item 300438381961 end time 16-Aug-10 01:59:59 EDT)

thanks

DigitalJunkie · 10th August 2010, 01:53 AM

That should work reasonably well.

Here's the amp,for those interested.
The MiniBlok II Push-Pull Amp: Introduction

chopchip · 02:12 AM

Quote:

Originally Posted by DigitalJunkie

That should work reasonably well.

Here's the amp,for those interested.
The MiniBlok II Push-Pull Amp: Introduction

reasonably well? can you elaborate a little

. the design calls for a 28:1 to 48:1 ratio. the ebay ad doesnt specify what the ratio is for the transformer. i have no idea.

so 10k is the impedance of the primary winding? 260 ohm DC Resistor 15 Henry - what does this mean? a henry is a measure of inductance that tends to keep current flowing. the author of this design recomends a hammond 125d transformer which is described as "Primary Inductance 4.48 Henries." is this critical in any way? how is this relevant?

thanks

DigitalJunkie · 10th August 2010, 02:37 AM

Well,with some quick mental math(ie,I could be way off!),something in the range of 6-12K:8ohms would be suitable,10K is right in the ballpark. IIRC,More inductance will lead to a 'fuller' low end.

chopchip · 10th August 2010, 02:46 AM

Quote:

Originally Posted by DigitalJunkie

Well,with some quick mental math(ie,I could be way off!),something in the range of 6-12K:8ohms would be suitable,10K is right in the ballpark. IIRC,More inductance will lead to a 'fuller' low end.

k. great. thanks

10th August 2010, 12:45 AM	#1
chopchip diyAudio Member Join Date: Feb 2010 Location: calgary alberta tundra canada	pp output transformer miniblok2 is this a good pp output transformer for the miniblok2 amp? 1 PP push-pull 10K 10Watt output transformer 4 VT-25 10 on eBay.ca (item 300438381961 end time 16-Aug-10 01:59:59 EDT) thanks

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10th August 2010, 01:53 AM	#2
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	That should work reasonably well. Here's the amp,for those interested. The MiniBlok II Push-Pull Amp: Introduction

10th August 2010, 02:37 AM	#4
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	Well,with some quick mental math(ie,I could be way off!),something in the range of 6-12K:8ohms would be suitable,10K is right in the ballpark. IIRC,More inductance will lead to a 'fuller' low end.

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