JE Labs

Saturday, May 26, 2012

Listening Room - Monaural Hi-Fi

Why mono?

The JEL SE2A3 and SE10 integrated mono amplifiers were built for this installation.

Idler driven turntables from Rek O Kut, Garrard, Presto, Bogen/Lenco, Neat and...

...viscous damped tone arms equipped with variable reluctance cartridges from GE > Tannoy.

Altec 802 + 416 drivers converted to field coil powered by a 12VDC power supply.

Jensen M10 field coil was featured in the 2009 November Hi-Fi Show.

another project....but just as significant ;)

Wednesday, May 16, 2012

Voigtlander: Vito II + Vito B

Scale focus cameras from the original German factory.

Late 40s-early 50s - folding

Voigtlander Vito II with Prontor S - B, 1s - 1/300

Mid 50s - rigid

Voigtlander Vito B with Prontor SVS - B, 1s - 1/300

Both cameras are equipped with the coated Color-Skopar 50mm, f3.5 Tessar type lens but there's a difference in performance under strong direct or side light situations....

Vito II + Agfa APX100 in Rodinal

Earlier Vito II is more prone to flare...

Vito B + Agfa APX100 in Rodinal

... it seems, coating technology made a leap within a couple of years.

Vito II + Agfa APX100 in Rodinal

Vito B + Agfa APX100 in Rodinal

more pics

TIPS

The shutter on both cameras will not work unless loaded with film. Got the Vito B for $10 because it was advertised with a non-functioning shutter. A dummy film roll fixed the shutter ;)

Back in the 40s and 50s, most entry level cameras were scale focus only. With the addition of an accessory rangefinder like this Prazisa, it becomes a rangefinder camera ala early Barnack.

Friday, May 11, 2012

Wednesday, May 2, 2012

A friend sent over a grey Leak 20 for check up. It was working up to spec however the gain was too much - Mullard 5-20 circuit using 3 x 12AX7 - as it was designed with the Leak Varislope preamp which did not have gain in the line stage. So I took out of storage my own Leak 20 which I padded down with resistors back in the early 90s so I can use it with my Dyna PAS preamp mod projects ;)

Metal film resistors and polypropylene caps, yikes!!! Been there, done that...I kept this for posterity ;)

Hooked up to the Altec 2-way...the Leak 20 is probably one of the finest PP EL84 amp ever manufactured, yet it was not able to match the transparency of any of my SE amps...no regrets going SE ;).