Right - but the bolts help tighten the laminations, it's like a
big sandwich.
corndog71 wrote:So I'm pretty sure the transformer is not bad. I've disconnected all of the secondaries and applied power to the primaries. Dead quiet.
As soon as I connect the filament leads I get buzzing.
(green+brown = A , green/white+brown/white = B)
corndog71 wrote:So I'm pretty sure the transformer is not bad. I've disconnected all of the secondaries and applied power to the primaries. Dead quiet.
corndog71 wrote:As soon as I connect the filament leads I get buzzing.
(green+brown = A , green/white+brown/white = B)
SVinzant wrote:Corndog71, what I was meaning about connecting the heater windings one at a time, you were basically there.corndog71 wrote:So I'm pretty sure the transformer is not bad. I've disconnected all of the secondaries and applied power to the primaries. Dead quiet.corndog71 wrote:As soon as I connect the filament leads I get buzzing.
(green+brown = A , green/white+brown/white = B)
So, you had all the secondary windings disconnected from the circuit.
You state that when you connected the heaters you hear the buzz return.
So, instead of connecting everything back, only connect the Green to "A" and the Green/White to "B". Is there a buzz?
Disconnect the Green and Green/White then try connecting the Brown to "A" and the Brown/White to "B". Is there a buzz?
Like I stated before, you are basically cutting the amount of current to power the heaters in half, which is probably not enough to run all six tubes. I think you also stated that you heard the buzz even with no tubes in. So, if that is true, it should not be an issue to hear the buzz with only one set of heater windings connected and no tubes installed. (If I am understanding and remembering everything I have read up to this point.)
Also, tape up the ends (NOT TOGETHER!) of the heater windings that are not connected to the circuit so they don't short to each other or other parts of the circuit.
I guess all this is assuming that your two sets of heater wires are all on separate ring terminals. If not, you will need to unsolder them.
Please try to post some pictures of the power transformer leads connected to the circuit board.
Scott
corndog71 wrote:What purpose do the 100R resistors serve? Could I run one heater secondary to 2 EL84s and one of the driver tubes and then hook the other heater secondary to the other pair of EL84s and driver tube and then connect both of them to the EL84 cathodes like in the stock circuit?
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