Installing Hammond 1609s in K12-G

cameronjp303 · 08:57 PM

Hi, this is my K12G amp. The case is made from a WW2 artillery shell box. I have been upgrading it recently. Mods include New coupling caps, removed blocking caps, filament snubbers, hv snubber and uf diode. I've got some hammond 1609 transformers that I would like to install now, but I am having trouble with the primary side.

The original output has a B+ and two other wires, the hammond has a B+ and four, here is some info
Hammond Mfg. - "Classic" Push-Pull - Tube Output Transformers - (1608 - 1620, 1645 & 1650 Series)
http://diyaudioprojects.com/Gallery/...ge.php?pid=368

cameronjp303 · 12th November 2011, 09:10 PM

I think I deleted my first post? Anyways I built a K12g amp. The case is a WW2 artilery shell box. I am in ht eprocess of upgrading it. The Mods I have done include new coupling caps, removed blocking caps, Hv snubber, filament snubbers and uf diode. I have some hammond 1609s i would like to install but I am having problems with the primary side.

The original transformer has a b+ and two other leads and the hammond has a b+ and four
S-5 Electronics K-12G Tube Amplifier Schematic - DIY Audio Projects Photo Gallery
Hammond Mfg. - "Classic" Push-Pull - Tube Output Transformers - (1608 - 1620, 1645 & 1650 Series)

brucetassin · 12th November 2011, 09:35 PM

The blue/yellow and the brown/yellow are not used in your case. Tape the end of these wires and tie them out of the way

rmyauck · 12th November 2011, 09:43 PM

Those extra wires Bruce mentioned to tape up/ insulate are for UL (Ultralinear) use if you choose to use that mode later on.

brucetassin · 12th November 2011, 09:47 PM

Yes, you are correct. You could convert your amp to ultralinear later if you want to compair the two modes.

rmyauck · 12th November 2011, 09:53 PM

UL can help with woofer low end bass control. Probably worth a try down the road as many like it. Probably depends on the speakers used for how you like it.

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12th November 2011, 09:10 PM	#2
cameronjp303 diyAudio Member Join Date: Aug 2011	I think I deleted my first post? Anyways I built a K12g amp. The case is a WW2 artilery shell box. I am in ht eprocess of upgrading it. The Mods I have done include new coupling caps, removed blocking caps, Hv snubber, filament snubbers and uf diode. I have some hammond 1609s i would like to install but I am having problems with the primary side. The original transformer has a b+ and two other leads and the hammond has a b+ and four S-5 Electronics K-12G Tube Amplifier Schematic - DIY Audio Projects Photo Gallery Hammond Mfg. - "Classic" Push-Pull - Tube Output Transformers - (1608 - 1620, 1645 & 1650 Series)

12th November 2011, 09:35 PM	#3
brucetassin diyAudio Member Join Date: Dec 2005 Location: Loganville, GA	The blue/yellow and the brown/yellow are not used in your case. Tape the end of these wires and tie them out of the way

12th November 2011, 09:43 PM	#4
rmyauck diyAudio Member Join Date: Apr 2009 Location: Northern Manitoba	Those extra wires Bruce mentioned to tape up/ insulate are for UL (Ultralinear) use if you choose to use that mode later on.

12th November 2011, 09:47 PM	#5
brucetassin diyAudio Member Join Date: Dec 2005 Location: Loganville, GA	Yes, you are correct. You could convert your amp to ultralinear later if you want to compair the two modes.

12th November 2011, 09:53 PM	#6
rmyauck diyAudio Member Join Date: Apr 2009 Location: Northern Manitoba	UL can help with woofer low end bass control. Probably worth a try down the road as many like it. Probably depends on the speakers used for how you like it.

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