EF12 TUBE PDF

Buy EF12 vacuum tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. The EF12 is a pentode designed for RF or IF amplification at HF or MF. The wide metal tube envelope is 36 mm in diameter, and excluding the footless base . I found one blurry schematic for use with an EF12 tube, of which I have a a cleaner/readable copy of the EF12 schematic, validation that this.

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Sredna Member Berlin, Germany Posts: It is a bit tricky to assemble a setup in the field, so I leave home with everything connected.

Peluso Microphone Grade Vacuum Tubes

Update Unrecognized Zip Code. The EF 12 II meets all my current macro demands. For further details see delivery estimates in cart.

Very likely it’s also JAN like in Max’s kit, and the resistor looks like 3. Before my membership was approved, I lurked for a long time and I’ve read many wonderful threads here, using the search function, about DIY Ualike microphones. It sounded more “hi-fi” – which is a bad way to describe a microphone I think, but it is the world that comes to mind. On the included comprehensive spec sheet this lens was not listed and I assumed it was because it was a fairly new lens.

Canon provides a usefel table with the extension tube that lists the change in minimum focal distance so that it can be used to pre-plan shots. Voltages are different its true. Other than that, the item is a very well designed and constructed Canon accessory that works flawlessly. Started by chefducuisine The Lab. International orders are processed the next shipping day.

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Started by sismofyt The Lab. The lenses I use are the nifty fifty and the mm kit. January 05, It’s the only part I have. Rated 5 out of 5 by Tjbe Wulfsohn from Great addition to your lens collection I do a lot of wildlife photography and often come across insects and flowers that present excellent photographic opportunities.

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DiMaggio encouraged photographers to carry this highly portable extension with them at all times. Build quality is excellent and product has a very solid feel. Yes, the guys at Flea decribed the ef12 as being a litlle less agressive than the ef14 so more hi-fi is probably the best definition.

I got a pretty good buy on it, NOS, and I’ve been wanting to build a mic anyway. Be the first to review this item. Hi there, For what i know of the ef12 in a u47, it has a reduced sensitivity and diferent heaters voltage. Nice odd looking EF12 tube mic on german ebay.

I use it with the nifty fifty and my mm kit lens, both are good copies. So I figured I’d go that route, as those two make nice mics.

I don’t have enough personal experience to have a genuine opinion either way. May 03, I found this thread which has some good info. Use it mainly with my nifty fifty lens and have tried it with my mm f4 lens. July 07, Order in the next 0: Rated 5 out of 5 by Anonymous from Having fun Photography is a hobby.

I like to shoot closeups but at this point don’t want to spend the money on a dedicated macro lens so got this extension tube and have had it for a week. Started by jeremycox The Lab. Ribbon microphone services http: Gus Member NJ Posts: When using the camera’s TTL metering system, no exposure compensation will be required exposure compensation is required for handheld meters. I preferred the EF12 slightly.

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So the EF 12 II extension tube has its limitations. As we all know, the photographic world is full of surprises.

EF14 and EF12 tube replacements

Next day, trying out the extension tube with the EF-SI found that a focused image was impossible to achieve optically with the zoom set at less than approximately 50 mm, but at the longer end of the zoom range there was no problem in getting a perfectly focused macro image.

It also allows autofocus to function normally.

Extension tubes are thus commonly used for macro photography and sometimes for closeup portraits. I first tried out this macro extension tube on an Tubs ultra-wide zoom.

I do wish that the tubes were slightly less expensive Canon or Kenko. I’ve built a couple of mics before, but not from scratch. All auto exposure features on the lens coupled to the extension tube work normally, and focusing is best done through varying your distance to the subject and fine focusing manually. We should all have our own logos and badges, IMO. Place er12 order by 5pm Wed Jan 2 and your order will ship the same day. I’ve done a fair amount of reading, and everyone has a passionate opinion about tubes tubbe use in “U47 Inspired” mics.

Did you have a chance to compare it in a ‘shoodoud ziduation’?