Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: joesatch on May 29, 2023, 10:27:15 am

Title: small chassis layout
Post by: joesatch on May 29, 2023, 10:27:15 am

Putting this very small power amp together. The chassis is a hammond 7x7.  Is there a rule about proximity of the input jack , speaker jack to the OT or PT (or input jack to speaker jack proximity)?  My plan is to have the input jack and speaker jack on the rear , The rear has both the PT and OT mounted next to each other.

Title: Re: small chassis layout
Post by: thetragichero on May 29, 2023, 10:30:35 am

best practice is input jack as far away from output jack and transformers as feasible. if it's just a power amp you'll probably be fine because you're not amplifying sub-volt signals (expected input is likely a volt or more)

Title: Re: small chassis layout
Post by: joesatch on May 29, 2023, 10:44:52 am

i might mount the input jack right over the P.I. on the front. Not what i wanted but i dont want headaches. I suppose i could build it all and wire the input jack on a coax wire and move it around to see if there are noise issues before i drill and mount it

Title: Re: small chassis layout
Post by: sluckey on May 29, 2023, 10:58:31 am

I suggest this...

Title: Re: small chassis layout
Post by: joesatch on May 29, 2023, 11:09:42 am

thanks ya i guess i'll go that route. might use one of these.

Title: Re: small chassis layout
Post by: sluckey on May 29, 2023, 11:12:16 am

Quote from: joesatch on May 29, 2023, 11:09:42 am

thanks ya i guess i'll go that route. might use one of these.

Another space saver. Good idea.

Title: Re: small chassis layout
Post by: joesatch on June 04, 2023, 02:01:23 pm

looks like we're in business. I've incorporated the hum-loop block network.

Title: Re: small chassis layout
Post by: joesatch on June 04, 2023, 02:55:03 pm

only question now is do i need to drill some ventilation holes in the chassis. these diecast hammond boxes seal up pretty well.

Title: Re: small chassis layout
Post by: sluckey on June 04, 2023, 07:15:03 pm

That's what us southern boys call 10lbs of shit in a 5lb box.    :thumbsup: