Japanese Peavey 5150 100v power transformer second tap...

[EthanSpaulding]

Anyone know what voltage connecting to the BL tap of a Japanese 100v 5150 power transformer would get me? Power transformer 70519027. Can I assume its a 120V tap?
Thanks in advance for any help!

 

[CJ]

Measure DCR of PRI wind taps, 120 tap should have more dcr by about 20 percent

So maybe you have a 5 ohm dcr on the 100 tap, 120 tap should read 6 ohms, you will need to compensate for lead resistance by touching leads and subtracting from measurement unless you have a dummy zero m

If it is a 240 tap nothing will pop, your tubes will barely light up, your plate voltage will be down, you will have low power and THC amp will sound like a big muff with a 3 volt battery, and this auto spell thing is driving me nuts, it put in THC instead of the The. Wtf?

 

[user 130681]

AS 100v is the lowest mains supply voltage if you plug it into a 120volt transformer, you will notice almost no difference than with a 100volt transformer.
As said above, if the transformer is 230/40 volt the heaters will be very dim and the HT very low, usually half voltage.
No damage will occur plugging it into 100volts mains.

 

[JohnRoberts]

Since you know the transformer mrps part number (70519027) ask Peavey Service dept to look it up.

If I had to guess, 120V is a possibility. As CJ suggests a simple VOM (Ohms) measurement will be instructive.

JR

 

[EthanSpaulding]

Thanks guys really appreciate it! A buddy half way across the USA from me ended up with it. I may get a chance to measure it this winter, if he keeps it. I did contact Peavey, they have alway been real good in the past. I used to work in a shop though, so I think that got me a little more priority.