Transformer terminals read 9 VAC rather than the "about 9.7 VAC" called for

PaulG · 556

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Offline PaulG

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Building a 5 year old Eros kit finally.
On page 42 of the manual the first item is to check the voltage between transformer terminals 4 and 5.  Mine measures 9.0 VAC rather than the "about 9.7VAC" called for in the manual.
The Bottlehead transformer (PT5) has a label that calls for 9VAC at Terminal 5 which is what mine measures.
Is 9.0 VAC close enough?  Have I done something wrong?

Paul Grisanti
Gentleman of a certain age
built Heathkits in the late 1960's
built two Audio by VanAlstine kits in 1990


Offline Paul Joppa

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Is your powerline voltage low? Does your meter have fresh batteries? I think those would be the likeliest causes.

Paul Joppa


Offline PaulG

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Thank you for the response.  Batteries in the GB meter are new as of 2 weeks ago.  I have access to a Klein multimeter which I will try to see if they agree and then check the line voltage.

Paul Grisanti
Gentleman of a certain age
built Heathkits in the late 1960's
built two Audio by VanAlstine kits in 1990


Offline PaulG

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Great call on the multi meter.  The Klein reads 9.69 volts so it looks like I can go forward.
Thank you for the guidance!

Paul Grisanti
Gentleman of a certain age
built Heathkits in the late 1960's
built two Audio by VanAlstine kits in 1990