RCA BA-73A

[ytrehalf]

I have a couple of these BA-73A modules sitting around. All the talk about the BA-71 got me thinking about these.

Has anyone here used BA-73 as mic amps? I have the documentation for them and the specs are similar to the BA-71 except that the BA-73 provides twice as much gain.

The output transformers on these are twice the size of the BA-71 outputs.

 

[soundguy]

damn, I bet those are cool...

dave

 

[ytrehalf]

No one seems to know much about them other than how they originally worked in the broadcast consoles.

 

[soundguy]

were they the output amplifiers on the busses in the consoles?

get them hooked up and bring them down!

dave

 

[ToobieSnack]

can you post some pics of these units?

 

[hitchhiker]

hi ytrehalf,

I have 4 of these and I've had one going as a mic pre.They are very good.

Very big and all there. Not the the heavy low mid thing of the BA-71.

cheers,
Lance

 

[BradAvenson]

I'll have to look in my junk pile, but I think I have some of the ba-73's. Unfortunately I don't have any schematics for them.

 

[ytrehalf]

[quote author="soundguy"]were they the output amplifiers on the busses in the consoles?

get them hooked up and bring them down!

dave[/quote]

Dave, I'm pretty sure that's what purpose they served. I do want to get these hooked up and the 71s as well. I'm pretty swamped right now. If I manage to get some time to get these things running I'll get a hold of you.

[quote author="hitchhiker"]hi ytrehalf,

I have 4 of these and I've had one going as a mic pre.They are very good.

Very big and all there. Not the the heavy low mid thing of the BA-71.

cheers,
Lance[/quote]

Thanks for the feedback, Lance. I can't wait to have a listen to these amps.

 

[ytrehalf]

[quote author="ToobieSnack"]can you post some pics of these units?[/quote]

Here's an ebay auction with some pics.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3278&item=7305196822&rd=1&ssPageName=WDVW

These are BA 73b. Mine are BA 73a. I'm not sure what the difference is.