22-06-2020, 09:01 AM
Just wondering Folks, has anyone ever heard of a "Roberts Valve & Circuit Analyser" - made by - London Sound Labs Ltd" back in the late 1940's ?
Yep, there is a mention in the Radiomuseum site, and I've a thread running in the VRR&R Forum. However, I'm still desperate to find a circuit diagram, as there is no technical data in the wee A5 users handbook. Its in an aluminium clamshell case something similar to the CT160's, but is about 12" sq. instead of oblong, and not as sturdy. It has no internal mains derived power supplies, but has a selection of adaptor leads which plug into any valve holder in any radio.
I've actually got a couple(both partially duff), with the intention of making a go-er of one.
Regards, David
Yep, there is a mention in the Radiomuseum site, and I've a thread running in the VRR&R Forum. However, I'm still desperate to find a circuit diagram, as there is no technical data in the wee A5 users handbook. Its in an aluminium clamshell case something similar to the CT160's, but is about 12" sq. instead of oblong, and not as sturdy. It has no internal mains derived power supplies, but has a selection of adaptor leads which plug into any valve holder in any radio.
I've actually got a couple(both partially duff), with the intention of making a go-er of one.
Regards, David
