- Posted by Doc B. (M) on July 10, 2006 at 09:00:13
In Reply to: Spec's for Technics rs1500 heads posted by ironbut on July 9, 2006 at 22:26:04:
Mikey P. got a non-Technics replacement playback head for his RS1500 from JRF Magnetics. He seems really happy with it. You might contact them to see what they can provide.We have had a preliminary discussion with a head builder about custom made playback heads, but it will be a few months before we have done the research we want to do and have some samples built.
Follow Ups:
- Yeah, I just checked my paperwork, and JRF installed..... - Mikey 16:36:47 07/10/06
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- In Reply to: Re: Spec's for Technics rs1500 heads posted by Doc B. on July 10, 2006 at 09:00:13:
a Panasonic 1/4 track playback head, and a Tascam 1/2 track playback head into my headstack.
I told John French I wanted some decent heads to work with vacuum tube playback electronics, without breaking the bank.....and that's what I got. They turned the job around in a few weeks, and delivered an optically aligned, ready-to-bolt-on headstack that sounds superb!
Call them up and tell them Mike Paschetto sent you!
Mike
- Thanks Mikey, I already dropped your name - ironbut 20:39:15 07/10/06
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- In Reply to: Yeah, I just checked my paperwork, and JRF installed..... posted by Mikey on July 10, 2006 at 16:36:47:
That's weird. I just emailed John French about the heads before I saw your post. I had asked you about the heads you had installed on your 1500 a few months ago so,. i did mention your name. I asked him for the spec.s on the new and stock heads and I'm sure he'd have those. Do those heads seem to have the same output? Sounds like your pretty happy with them. Doc and Paul are looking into using some custom? Flux Magnetics head as I recall from a post after Dan returned from his amp building class. Sounds $$$ though. Well, as soon as I find out anything concrete, I'll post the info here. It seems like, if we're designing a dedicated playback amp, the impedance should at least be matched right from the start rather than adding load resistors to load resistors right? I guess I'm coming from a vinyl guys perspective, but , they're both magnetically induce voltage i figure.
- Re: Thanks Mikey, I already dropped your name - Doc B. 09:32:37 07/11/06
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- In Reply to: Thanks Mikey, I already dropped your name posted by ironbut on July 10, 2006 at 20:39:15:
It's most likely that the heads will be happy running into a 100K or higher load. We put a 250K trimpot on the input grid so we can tweak it while watching the high frequency response. Output level hasn't been an issue with the stock heads. I think the type of heads that might create an issue are low impedance heads like those on the ATR 100.
- The replacement heads.... - Mikey 06:49:39 07/11/06
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- In Reply to: Thanks Mikey, I already dropped your name posted by ironbut on July 10, 2006 at 20:39:15:
seem to have roughly the same output as the stock heads.
I haven't experimented with load resistors or impedance matching transformers....yet!
Mike
- Re: Thanks Mikey, I already dropped your name - Doc B. 09:32:37 07/11/06
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- Thanks Mikey, I already dropped your name - ironbut 20:39:15 07/10/06
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