Just getting started on AK

[J57LITTLE]

I have had a lot of electronics training and have good experience with some leading audio companies, but troubleshooting and build-from-scratch are areas where I am very interested and could use some help for sure. I am a fairly skilled speaker builder, including advanced woodworking and finishes. I'm interested in vintage solid state receivers and amplifiers, but am also starting into some tube activity. I have no interest in the Lowrey organ whence I just harvested a huge transformer and a boatload of tubes, but I am very interested in Hammond B3/C3/A100. My big task now is getting a Yamaha CR640 service manual - appreciate any advice on this topic!.

 

[jbrainey]

Hello and welcome to Audiokarma.org

 

[Dswankey]

I have had a lot of electronics training ... but troubleshooting and build-from-scratch are areas where I am very interested and could use some help for sure. I am a fairly skilled speaker builder, including advanced woodworking and finishes. I'm interested in vintage solid state receivers and amplifiers, but am also starting into some tube activity. I have no interest in the Lowrey organ whence I just harvested a huge transformer and a boatload of tubes, but I am very interested in Hammond B3/C3/A100. My big task now is getting a Yamaha CR640 service manual -

Welcome aboard!

You might find the DIY sub forum helpful with regards to "build-from scratch"

https://www.audiokarma.org/forums/index.php?forums/diy.15/

Re; CR-640

Schematic here, I know it's not the service manual but might help if not try here

http://akdatabase.com/AKview/thumbnails.php?album=3&page=7

https://www.hifiengine.com/manual_library/yamaha/cr-640.shtml

Re; Lowrey organ

Hold on to those tube and tranny they might come in handy some day down the road

 

[antpaubarcar]

Welcome to AK!

 

[rickb119]

Welcome!

 

[hugo454]

Welcome

 

[Lavane]

Welcome aboard! And I second keeping tubes, power transformers, chokes and output transformers.

 

[avionic]

Welcome aboard..

 

[J57LITTLE]

Welcome aboard!

You might find the DIY sub forum helpful with regards to "build-from scratch"

https://www.audiokarma.org/forums/index.php?forums/diy.15/

Re; CR-640

Schematic here, I know it's not the service manual but might help if not try here

http://akdatabase.com/AKview/thumbnails.php?album=3&page=7

https://www.hifiengine.com/manual_library/yamaha/cr-640.shtml

Re; Lowrey organ

Hold on to those tube and tranny they might come in handy some day down the road

I plan to repurpose the 6V6's and 5U4G into a custom guitar amp. There are many 6X8 tubes that have no value for me, but someone will want them and I'll make a gift of them at some point.

This is great information on the CR-640. Seems I tried the hifi engine site before, but this is exactly what I needed. Thank you very much!!!! Now once I find some 2SC1815 and 2SD734 transistors or suitable subs I should have a fully functional CR-640!

 

[J57LITTLE]

Welcome aboard..

I was also an Eagle Keeper. Started out as an E1, assigned to Langley in the avionics intermediate shops, but from there I went for a commission. Retired in 2017 as a Lt Col, but I still prefer the hands-on electronics.

 

[J57LITTLE]

Welcome aboard! And I second keeping tubes, power transformers, chokes and output transformers.

The 12AX7A's are already sold, but I plan to build a guitar amplifier with the transformer, the 6V6's and the 5U4B. No idea what to do with the 6X8's, but I have a bunch of them!

 

[avionic]

assigned to Langley in the avionics intermediate shops,

I too was intermediate shop (TITE and TISS) and You.. Stationed at Eglin ,Bitburg and Keflavik..

 

[Lavane]

The 12AX7A's are already sold, but I plan to build a guitar amplifier with the transformer, the 6V6's and the 5U4B. No idea what to do with the 6X8's, but I have a bunch of them!

That's what I've been doing with iron and tubes I have laying around.
So far a 6L6 SE, 6V6 SE and 6K6 SE head amps.

 

[J57LITTLE]

I too was intermediate shop (TITE and TISS) and You.. Stationed at Eglin ,Bitburg and Keflavik..

I remember TITE - just don't recall what it stood for. I always wish I had made it to PMEL, but I was on the automatic test stations and those Bendix stations were just awful. After commissioning they sent me back to Langley and I was OIC of the intermediate shops. I was on F-15's, but also had F-16 assignments as well. Many fond memories.

 

[Hyperion]

Welcome to AK!

 

[squirrelnest]

Welcome to the forums from Virginia.

 

[Dswankey]

I plan to repurpose the 6V6's and 5U4G into a custom guitar amp. ..

Nice!!!!

 

[electronjohn]

Welcome!

 

[Rome]

Greetings to ya!

Rome

 

[avionic]

I remember TITE

TEWS Intermediate Test Equipment it was replaced by TISS TEWS Intermediate Support Suite .. My initial AFSC was F-15 EW/ECM . Early 90's was certified on both Manuals and Automatic test stations as well as TISS..