Bottlehead Forum

General Category => General Discussion => Topic started by: Dr. Toobz on June 29, 2013, 07:56:26 AM

Title: As seen on eBay - a $70k battery tube "amp"
Post by: Dr. Toobz on June 29, 2013, 07:56:26 AM: Makes the Quickie look like an even better deal: http://www.ebay.com/itm/Battery-Tube-Only-Headphones-Amplifier-For-Sennheiser-HD-580-600-650-Beyer-DT880-/330945466701?pt=US_Pro_Audio_Amplifiers&hash=item4d0de3114d
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: Doc B. on June 29, 2013, 09:12:24 AM: Looks to me like the price is high in order to recover the cost of the elegant cabinet.
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: Grainger49 on June 29, 2013, 10:53:50 AM: Oooo, Dan you need that tongue-in-cheek smiley face.

I fear it might look obscene.
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: John EH on June 29, 2013, 12:59:57 PM: Yeah but it comes with a cable too! :)

Smiley face for Grainger.
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: 2wo on June 29, 2013, 04:08:58 PM: And free shipping...John
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: Wanderer on June 30, 2013, 02:48:37 AM: Any ideas on how/if this thing might work?

Looks two tubes, jacks and a battery. With no DC blocking cap I can't imagine running 12 volts into the voice coil of one's HD 600/650 is going to do them any good.

My guess is this is a gag of some sort. ...that said - If I thought I could make these up and sell just two of them a year at the "Buy It Now" price I would happliy retire from my "day job".
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: Grainger49 on June 30, 2013, 03:34:21 AM: I'll go with gag. Maybe a shill for the site he mentions?
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: Dr. Toobz on June 30, 2013, 04:36:45 AM: I sure hope so, given the lack of output coupling! Moreover, I wasn't aware that these "space charge" tubes had a particularly low plate impedance, given that they run at such a low voltage and puny currents. So, I am at a loss as to how a 150 ohm to 600 ohm device could just be "connected" without having a huge impedance mismatch - unless the output is being taken off the cathode. Even then, a cathode follower's output impedance is the inverse of its transconductance - which these little tubes cant have much of!

This thing has been listed for months, by the way - I just ran across it again recently and thought I'd share a laugh. So, there's a listing fee being paid over and over again for some reason or other....
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: Paul Birkeland on June 30, 2013, 07:16:24 AM: I am 99.9% sure it's intended to be humorous (it made me laugh, especially when reading the description).

-PB
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: coca on June 30, 2013, 09:54:22 AM: I'm so greatful the shipping is free.

Bernie.
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: dubiousmike on July 03, 2013, 08:45:11 AM: Too funny! It would actually be pretty cool to have as an art piece, provided there was a $69.9k price reduction.
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: Downhome Upstate on July 03, 2013, 10:03:33 AM: Just the thing to help jump-start the Greek economy.
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: 4krow on July 03, 2013, 10:14:38 AM: As Maxwell Smart used to say,"I missed it by THAT much." "Ninety nine, let's discuss this in the 'dome of silence' if you get my drift." Actually, he never said that.
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: Roger on July 04, 2013, 09:37:57 AM: Quote from: Doc B. on June 29, 2013, 09:12:24 AM
Looks to me like the price is high in order to recover the cost of the elegant cabinet.

;D
Roger
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: earwaxxer on July 04, 2013, 09:46:09 AM: I'm Greg could design one for half that! With a cigar box chassis to boot!
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: 4krow on July 04, 2013, 09:57:35 AM: LOL! Yes fools, er, friends, you can buy an exquisite and one of a kind ceegar box that's plays music and needs NEVER be wound! $35k while they still last. One per household pleese.
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: earwaxxer on July 04, 2013, 10:26:22 AM: LOL! - happy 4th you crazy fuck!
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: 4krow on July 04, 2013, 11:08:19 AM: How dare you refer to me as the '4th'. Clearly, I am #1
Title: Re: As seen on eBay - a $70k battery tube "amp"
Post by: earwaxxer on July 04, 2013, 11:59:07 AM: You're lucky you are not online right now, or I would come over there and kick your ass!