I went in on that deal several years ago where a gentlemen was selling a number of 7018 and 7019 transformers for tube amps. I have some of both of them left over, and they are taking up room on the bench. I have four 7019s in boxes, and two 7018s in original shipping boxes. I have one more of each not in an original shipping box (in the picture to the right). If you want one, I can chunk it in a USPS flat rate box which costs $15, putting the total at $30. I can put THREE in a single USPS medium flat rate box for the same shipping price. It is a real deal to purchase three in a flat rate box, which would be $60 for three transformers. None of these transformers have been used. Here are the original ads for them: 7018 Secondary 176VAC (249VDC with rectifier, 498VDC with doubler, unloaded)
blue-blue 34VAC
grn-grn 7VAC
yel-yel 7VAC Primary: 110: Black+Black/Yellow - Black/Pink+Red/Green
Primary: 220: Black - Red/Green, Black/Pink + Black/Yellow 7019 Secondary 235VAC (332VDC with rectifier, 664VDC with doubler, unloaded)
blue-blue 44VAC
grn-grn 6.8VAC
yel-yel 6.8VAC
org-org 6.8VAC Primary: 110: Black+Black/Yellow - Black/Red+Red/Green
Primary: 220: Black - Red/Green, Black/Red+Black/Yellow
On the 7018 the ad was:
IT HAS A COPPER FLUX SHORTING BAND. DUAL PRIMARY. IT'S SECONDARY VOLTAGES ARE, RED to RED 170v NO CENTER TAP--- BLUE to BLUE 33v --- GREEN to GREEN 6.8v with C.T.and THICKER WIRE --- YELLOW to YELLOW 6.8v . ALL VOLT VALUES UNLOADED. Not knowing the specs on this transformer. I proceeded as follows.
I loaded the secondary red winding to 265 ma. and filament green winding to 6 A. The voltages are now 444 VDC and 6.3 VAC., for 8 hours to check for temperature rise. I did not load the YELLOW winding thinking it is for a tube rectifier filament which probably no one will use, and BLUE is only for negative bias. I had a 42 degree C rise in primary temperature.. DIMENSIONS ARE 3 1/2 x 4 7/8 x 4 1/4 HIGH The Red winding needs to have a Voltage doubler Capacitors for a 480VDC supply unloaded. With a bridge you will get 240VDC. The Manufacturer was Woodward-Schumacher in Chicago. On the 7019 the ad was: IT HAS A COPPER FLUX SHORTING BAND. DUAL PRIMARY. IT'S SECONDARY VOLTAGES ARE, RED to RED 235v--- BLUE to BLUE 44v --- GREEN to GREEN 6.8v with C.T.and THICKER WIRE --- YELLOW to YELLOW 6.8v --- ORANGE to ORANGE 6.8v. ALL VOLT VALUES UNLOADED. Not knowing the specs on this transformer. I proceeded as follows.
I loaded the secondary red winding to 200 ma. and filament green winding to 6 A. The voltages are now 607 VDC and 6.3 VAC., for 8 hours to check for temperature rise. I did not load the YELLOW or ORANGE winding thinking they are for tube rectifier filaments which probably no one will use, and BLUE is only for negative bias. I had a 35 degree C rise in primary temperature.. DIMENSIONS ARE 3 1/2 x 4 7/8 x 4 1/4 HIGH The Red winding needs to have a Voltage doubler Capacitors for a 660VDC supply unloaded. The Manufacturer was Woodward-Schumacher in Chicago.
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