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 Post subject: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Nov Sun 27, 2011 12:27 am 
Member

Joined: Dec Sat 01, 2007 12:46 am
Posts: 669
Location: connecticut , usa
hi:
just picked up one of these

no cabinet , very clean , seems to check out ok

what are these things worth ?

WALT , wolcott , ct .


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 Post subject: Re: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Nov Sun 27, 2011 1:10 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 13270
Location: Fernandina Beach, FL
Hi Walt,

I always wanted on even though all of my tape decks have preamps in them. It is certainly a keeper. There is a tuner and a couple amplifiers that match that style. Kinda nice. As for a specific price, can't tell you other than I would keep it...

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 Post subject: Re: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Nov Sun 27, 2011 3:18 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 30698
Location: Pocasset, Cape Cod, MA
I think that is the model I used in college, paired with a Knight/Bell 3-motor deck that had no electronics. I wouldn't expect a lot of demand for it now.


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 Post subject: Re: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Nov Sun 27, 2011 3:37 am 
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Location: Detroit, MI USA
I don't think they have any value at all. Very few people are using tape decks that don't have built in electronics, and the ones that do use them typically want the brand of R/P preamp that exactly matches their deck.

I had one of these Knight-Kit units a couple of years ago that I got for free, and I couldn't sell it at a radio show for even $10. Ended up pulling the tubes and power transformer and scrapping the rest. You can probably sell the tubes for more than you could the complete unit.

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Experience is what you gain when the results aren't what you were expecting.


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 Post subject: Re: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Nov Sun 27, 2011 9:27 am 
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Joined: Sep Thu 23, 2010 6:37 am
Posts: 9657
Location: Powell River BC Canada
I'd hold onto the tape playback pre-amp. It's a tweak away from becoming a RIAA
phono preamp, or even a tube-end that some artists want to run their final mix though.

Modified and rebuilt as such might fetch good money.

Do the Vu meters work?

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VE7ASO VE7ZSO
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 Post subject: Re: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Nov Sun 27, 2011 4:55 pm 
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Joined: Dec Sat 01, 2007 12:46 am
Posts: 669
Location: connecticut , usa
does anyone out there have a manual for this thing ?

WALT , wolcott , ct .


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 Post subject: Re: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Nov Sun 27, 2011 10:25 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 4058
Location: Boston, MA USA
Tube-type tape recorder electronics can go for a lot of money from those looking for a "phat tube mic pre." But to qualify, the electronics must have a mic preamplifier with a balanced XLR input, a VU meter, and a balanced output. So the vacuum tube Ampex 351 electronics go for a lot, while the superior (from a tape recording perspective) AG-440 electronics which are solid-state and have no mic preamp stage go for nothing.

-David


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 Post subject: Re: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Dec Fri 02, 2011 4:25 am 
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Posts: 18581
Location: Warner Robins, GA
Could easily be turned into a phono preamp. Either that or ask around if anyone has the deck that rec play amp went to and needs the electronics for it.


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 Post subject: Re: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Dec Mon 05, 2011 3:27 am 
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Joined: Dec Mon 05, 2011 3:24 am
Posts: 1
Hi Walt I would like to buy your Knight Kp-70
Sam


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 Post subject: Re: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Feb Thu 01, 2018 12:44 am 
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Joined: Dec Thu 31, 2009 4:28 pm
Posts: 4505
Location: Medford OR
It looks like Walt hasn't been here for a while, but I thought I would reuse his thread with ready-made pictures.

Just got one of these that has been modified slightly. It would be nice to find a schematic. Anybody have one?

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http://russoldradios.com/


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 Post subject: Re: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Feb Sat 03, 2018 10:44 pm 
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Joined: Dec Sun 21, 2014 5:03 am
Posts: 205
Location: Traverse City, MI 49684
I've got one tucked away in my files. It will need to be scanned. Let's see if somebody else has one ready to go. If not, holler and I'll dig it out.

I built mine new in about 1965. Bought it from Knight with the Bell 3-motor, 3-head deck and a portable--"portable," that is, given the total weight--case.

Chris Campbell


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 Post subject: Re: knight KP -70 rec. - play preamp ( tube type )question
PostPosted: Feb Sat 03, 2018 11:44 pm 
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Joined: Dec Thu 31, 2009 4:28 pm
Posts: 4505
Location: Medford OR
Chris, that would be great. I doubt that there is another schematic. The unit is not very common.

I'll send you my email on a PM.

Russ

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"I just might turn into smoke, but I feel fine"
http://russoldradios.com/


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