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Author Topic: Eros Connection to Revox B77  (Read 305 times)

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Offline kevemaher

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Eros Connection to Revox B77
« on: March 09, 2017, 09:30:14 pm »
Hi, just joined. Seriously looking at the Eros. I have a B77 4 track 3-3/4 and 7-1/2 ips. Records and plays well. Very basic questions:

1. What inside the B77 do I connect the Eros input to? I have the B77 repair manual. I am very tech savvy (I repair and align analog FM tuners). I plan to do the work myself.
2. Can I connect the Eros output directly to a line input on my preamp (Levinson 38s) just as I connect my phono preamp?

Thanks!
Kevin

Offline Doc B.

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Re: Eros Connection to Revox B77
« Reply #1 on: March 10, 2017, 04:59:41 am »
1) You will need to connect the Eros to the play head. This usually means finding the cable attached to the play head, disconnecting it from the internal repro amp, and extending/reterminating it so it can be connected to the input of the Eros. Every case is a little different and I have not done this mod to a B77. So I'm afraid I can't be any more specific.

2)Yes, it connects to a line level input on your control preamp, just like a phono preamp would.

I will also mention that the EQ settings are NAB and IEC1. NAB will work with most all 7.5ips tapes. It will also work with 3.75 ips tapes, but it's slightly off on the HF response, the HF turnover for NAB 7.5 being 50uS and the turnover for 3.75 being 90uS. What this means is the top end at 3.75 ips will sound a little bit rolled off.
Dan "Doc B." Schmalle
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Bottlehead Corp.

Offline kevemaher

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Re: Eros Connection to Revox B77
« Reply #2 on: March 11, 2017, 08:06:26 pm »
Wow! Thanks for the fast reply.
Does the eros provide both eqs? How? Switchable?
I don't mind a bit HF roll-off.
Kevin

Offline Doc B.

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Re: Eros Connection to Revox B77
« Reply #3 on: March 12, 2017, 05:48:08 am »
Yes there is a switch for the two eq settings.
Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.