First amp build

[Mongrel714]

Hello all,
 Try this again, I am building my first amp, I'm using the chassis from a Hammond organ, An AO-37, not a prime amp to convert, but I have cut down the chassis, and re arranged the components, I'm ordering some parts and getting ready to solder, I look forward to learning this craft, please take a look and see if I'm going in the right direction as far as wiring and parts, Ill have al new components except for the transformers, any parts that are on there now are place holders! Thanks in advance!

[Mongrel714]

Ok cool, I have seen the "Go her first" page so I will be looking through that as I go along, Thanks again!

[Mongrel714]

Hey guys, I do have a question here, The way the Heater twisted pairs are running, and the Blue and red from the Output tranny, with that as it is will the wires to the speaker jacks be ok were they are? in general will all the wiring be ok how it is run?? Thank you!!

[acheld]

Your heater wires are nicely twisted.  The priority is to keep your signal wires away from your AC (heater and mains) wires -- that's where you will have real problems.   

Avoid running your output wiring in parallel with AC.  If you need to run output wires across heaters, which most designs will do, cross at or near 90 degrees and separate in the Z dimension, just like Leo did back in the day.   

Don't get stuck on the wiring at this stage.   Do understand that this is a learning process, and have fun with it. 

You should have a plan drawn out.  Much easier to erase pencil lines than desolder wires and re-drill holes!   

For a first amp, I always favor Doug Hoffman's plans -- go to https://hoffmanamps.com/MyStore/perlshop.cgi?ACTION=enter&thispage=PartsListIndex.htm&ORDER_ID=!ORDERID!#google_vignette to find an amp similar to your design, and then check out the project links on the right, which will give you some ideas.

[dogburn]

If this was my project, I'd relocate the output transformer closer to the middle of the chassis, so that the wires could be run in more of a straight line to the power tubes and output jacks. That hole you have near V2 and V3 would be where I'd put it.

By the way, what amp model are you aiming to build? Looks like a push-pull of some sort. Knowing that would help people give you advice.

[sluckey]

I believe your OT is wired wrong. That OT has three primary wires. Blue and Brown should go to the output tube plates and red (center tap) should go to B+.

I agree with dogburn. That OT is located in a bad place. I suggest putting it between the rectifier socket and the output sockets. That will simplify those long wiring runs and the problems they may cause.

[Mongrel714]

acheld and Dogburn, and sluckey, Thank you for the reply's!
What I was hoping to build is a JCM 800 type 50w circuit, I don't know yet if the transformer is the proper voltage, The circuit I'm looking at is posted below,
I have been debating on moving the output transformer, so now Ill do that, and the signal wire advice will be taken acheld!
and sluckey, thank you for noticing that, I will correct that, mentioning the rectifier socket, using the diagram below, should I use the tube rectifier, or go with a Solid state rectifier here? I have already ordered a components kit with all the smaller resisters and caps, diodes, so whichever I should use would be fine with me!
 The turret board I'm using is 10" long so its a little cramped but should work, will there be a problem running anything under it given enough clearance?
I installed the proper fuse holder next to the power inlet, I have another on the way for the H.T. Thanks again guys!
Pics!