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#1
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Suggestions for a 5k output transformer/ SV811-3
Hi-
Any suggestions for iron to use with a SV811-3? I'm in the States, and Hammond's 1628SE look like my fall-back option. I have also read claims on at least 2 websites whilst looking for 5k outties, that Hammond transformers are not known for their extension, but rather bass response. On one web page they stated that "UBT" were "sweeter" (at half the weight - not that this factors into high frequency extension) Any takers? thanks for any advice, KC |
#2
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I appreciate your reply. The transformers you mention are as follows:
(I contacted Plitron, Canada) "We have our part number PAT-HQ5090 correspondence to the following part. The unit price is $611.00US. Lead time is 4 weeks" which is too rich for my blood. I am going to use James transformers which I acquired (in trade for some work I did) at: 6135HS, http://euphoniaaudio.netfirms.com/ea...0866fb75fefe9a thanks to all those that post advice on RAT, pyros aside KC On 23 Apr 2005 06:22:32 -0700, " wrotf: wrote: Hi- Any suggestions for iron to use with a SV811-3? I'm in the States, and Hammond's 1628SE look like my fall-back option. I have also read claims on at least 2 websites whilst looking for 5k outties, that Hammond transformers are not known for their extension, but rather bass response. On one web page they stated that "UBT" were "sweeter" (at half the weight - not that this factors into high frequency extension) Any takers? thanks for any advice, KC Yo, mon, For my "Millennial Edge" I had Menno van der Veen design the transformers, power and output. The "Millennial Edge" is a "Universal" SE/PSE 20-75W amplifier for Svetlana SV572-xx, similar in some crucial parameters to SV811-3 Here are brief details of the output and power transformers: Wide Bandwidth Low Loss Toroidal Single Ended OutputTransformer Type No VDV-JUTE-HQ5090 (Amplimo)Designed by Menno van der Veen, ir. Buro Vanderveen Pri Z 5.014Kohm Secondaries 2, 4, 8 ohm (winding ratios 50.069, 35.415, 25. 034) Nominal power 90W (at half saturation current, 190mA) Saturation current 379mA Primary Inductance 31.8H Full power bandwidth starting at 28Hz -1dB Frequency range 16 Hz--23kHz (-1dB) HF extension 44kHz (-3dB) Insertion loss 0.152--0.225dB depending on secondary connection Primary leakage inductance 28mH Effective primary capacitance 0.44nF *Size approx 7in diameter by 4in high (very roughly measured!) *Weight approx 9kg or say 20lbs Connections by insulated flying solid core extensions of windings (no solder joints) with tinned ends Packaged in heavy gauge drawn ali case, matte black finish *These items are not off the preliminary spec sheet, which is out of the designer's lab rather than from the manufacturer, but my own measurements. SV572 reach max dissipation of 125W, with 210mA and 1000V as the other maximum parameters. I wanted to get max A1 power when using the SV572-3 and SV572-10 before they go into A2, which requires high voltages. The primaries of the outputs are specced to be used at least up to a 1000V. The key application is PSE Svetlana SV572-30, (Rp for a parallel pair 2.3Kohm) at around 100mA per anode but the transformer also works with single tubes of the SV572 family. Various pri Z are achieved by switching the secondary connections to reflect different impedances on the primaries. (I also intend one day building a 212-E SE amp on this tranny.) The power supply has individual windings for power, driver and input tubes, and more windings for multiple individual fixed bias supplies to these tubes (we want deep bass!), plus of course filament windings. It offers maximum flexibility so as to be useful for other projects as well (like the 212-E above), and it is plenty beefy because a hefty SE amp like the Millennial Edge just naturally ends up driving current-hungry panels. Naturally I went to Menno for the power supply as well: Multi-Purpose Mains Power TransformerTransformer Type No 6632-X0-00 (Plitron)Designed by Menno van der Veen, ir. Buro Vanderveen Primary (international use) 2 x 120 V RF Shield Yes Low Noise NC-15 Design Yes Cased in heavy gauge drawn ali case, matte black finish, foam base, neoprene mounting ring, single bolt fixing Connections by insulated colour coded flying leads Size approx 7.5in diameter by 5in high Weight approx 12kg Sec.1 after rectifying 1050 V / 0 mA 1000 V / 200 mA 950 V / 400 mA 800 V tap Yes Centre tap No Sec.2 after rectifying 520 V / 0 mA 480 V / 150 mA Centre tap No Sec.3 after rectifying 0/70/140/275 V at 0 mA 0/65/130/250 V at 150 mA Sec.4 Filament, after rectifying 7.0 V / 0 A 6.3 V / 4 A Centre tap Yes Sec.5 as Sec.4 Sec.6 Filament, drivers + rectifier 7.0 V / 0 A 6.3 V / 4A Centre tap No My prototypes were designed by Menno van der Veen with the output transformer prototypes wound by Amplimo and the mains transformer prototypes wound by Plitron, both of whom manufacture Menno's famous mainstream designs. I was told that Plitron in Canada and Amplimo in The Netherlands would catalogue both designs: http://www.plitron.com/ http://www.amplimo.nl/ HTH. Andre Jute |
#3
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If 611 bucks US is all that Plitron charges for the versatile
high-power PAT-HQ5090, essentially a custom transformer, a huge thing of superior design and craftsmanship, about eight inches in diameter, very beautifully presented in a drawn ali case anodized black, that goes a long way to explaining why nobody gets rich winding transformers for the audio market. -- Andre Jute wrote: I appreciate your reply. The transformers you mention are as follows: (I contacted Plitron, Canada) "We have our part number PAT-HQ5090 correspondence to the following part. The unit price is $611.00US. Lead time is 4 weeks" which is too rich for my blood. I am going to use James transformers which I acquired (in trade for some work I did) at: 6135HS, http://euphoniaaudio.netfirms.com/ea...0866fb75fefe9a thanks to all those that post advice on RAT, pyros aside KC On 23 Apr 2005 06:22:32 -0700, " wrotf: wrote: Hi- Any suggestions for iron to use with a SV811-3? I'm in the States, and Hammond's 1628SE look like my fall-back option. I have also read claims on at least 2 websites whilst looking for 5k outties, that Hammond transformers are not known for their extension, but rather bass response. On one web page they stated that "UBT" were "sweeter" (at half the weight - not that this factors into high frequency extension) Any takers? thanks for any advice, KC Yo, mon, For my "Millennial Edge" I had Menno van der Veen design the transformers, power and output. The "Millennial Edge" is a "Universal" SE/PSE 20-75W amplifier for Svetlana SV572-xx, similar in some crucial parameters to SV811-3 Here are brief details of the output and power transformers: Wide Bandwidth Low Loss Toroidal Single Ended OutputTransformer Type No VDV-JUTE-HQ5090 (Amplimo)Designed by Menno van der Veen, ir. Buro Vanderveen Pri Z 5.014Kohm Secondaries 2, 4, 8 ohm (winding ratios 50.069, 35.415, 25. 034) Nominal power 90W (at half saturation current, 190mA) Saturation current 379mA Primary Inductance 31.8H Full power bandwidth starting at 28Hz -1dB Frequency range 16 Hz--23kHz (-1dB) HF extension 44kHz (-3dB) Insertion loss 0.152--0.225dB depending on secondary connection Primary leakage inductance 28mH Effective primary capacitance 0.44nF *Size approx 7in diameter by 4in high (very roughly measured!) *Weight approx 9kg or say 20lbs Connections by insulated flying solid core extensions of windings (no solder joints) with tinned ends Packaged in heavy gauge drawn ali case, matte black finish *These items are not off the preliminary spec sheet, which is out of the designer's lab rather than from the manufacturer, but my own measurements. SV572 reach max dissipation of 125W, with 210mA and 1000V as the other maximum parameters. I wanted to get max A1 power when using the SV572-3 and SV572-10 before they go into A2, which requires high voltages. The primaries of the outputs are specced to be used at least up to a 1000V. The key application is PSE Svetlana SV572-30, (Rp for a parallel pair 2.3Kohm) at around 100mA per anode but the transformer also works with single tubes of the SV572 family. Various pri Z are achieved by switching the secondary connections to reflect different impedances on the primaries. (I also intend one day building a 212-E SE amp on this tranny.) The power supply has individual windings for power, driver and input tubes, and more windings for multiple individual fixed bias supplies to these tubes (we want deep bass!), plus of course filament windings. It offers maximum flexibility so as to be useful for other projects as well (like the 212-E above), and it is plenty beefy because a hefty SE amp like the Millennial Edge just naturally ends up driving current-hungry panels. Naturally I went to Menno for the power supply as well: Multi-Purpose Mains Power TransformerTransformer Type No 6632-X0-00 (Plitron)Designed by Menno van der Veen, ir. Buro Vanderveen Primary (international use) 2 x 120 V RF Shield Yes Low Noise NC-15 Design Yes Cased in heavy gauge drawn ali case, matte black finish, foam base, neoprene mounting ring, single bolt fixing Connections by insulated colour coded flying leads Size approx 7.5in diameter by 5in high Weight approx 12kg Sec.1 after rectifying 1050 V / 0 mA 1000 V / 200 mA 950 V / 400 mA 800 V tap Yes Centre tap No Sec.2 after rectifying 520 V / 0 mA 480 V / 150 mA Centre tap No Sec.3 after rectifying 0/70/140/275 V at 0 mA 0/65/130/250 V at 150 mA Sec.4 Filament, after rectifying 7.0 V / 0 A 6.3 V / 4 A Centre tap Yes Sec.5 as Sec.4 Sec.6 Filament, drivers + rectifier 7.0 V / 0 A 6.3 V / 4A Centre tap No My prototypes were designed by Menno van der Veen with the output transformer prototypes wound by Amplimo and the mains transformer prototypes wound by Plitron, both of whom manufacture Menno's famous mainstream designs. I was told that Plitron in Canada and Amplimo in The Netherlands would catalogue both designs: http://www.plitron.com/ http://www.amplimo.nl/ HTH. Andre Jute |
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