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Post by spock on Jul 3, 2015 14:39:29 GMT -6
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Post by Johnkenn on Jul 3, 2015 17:35:48 GMT -6
Is there no output transformer on the Type 69?
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Post by Johnkenn on Jul 3, 2015 17:38:12 GMT -6
Here's a pic.  |
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ericn
Temp
Balance Engineer
Posts: 16,107 
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Post by ericn on Jul 3, 2015 18:20:07 GMT -6
I see a big old output tranny in his pics!
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Post by Johnkenn on Jul 3, 2015 23:30:05 GMT -6
Yeah - but I don't see one on the Helios...or am I blind?
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Post by jeromemason on Jul 3, 2015 23:47:44 GMT -6
Believe the Mu can is the output tranny on the one you're showing John. Sometimes they're cased, sometimes they're not. The one on the Realios looks really similar to an Edcor with a white bobbin and wrapping instead of the typical black. The one on yours is probably just a shielded output transformer.
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Post by Ward on Jul 4, 2015 7:59:30 GMT -6
The one John pictured has EQ. I wouldn't even consider pres without EQ these days.
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Post by nobtwiddler on Jul 4, 2015 8:53:39 GMT -6
Input tranny only on Tony's Helios 69 reissues!
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Post by Johnkenn on Jul 4, 2015 10:37:35 GMT -6
nobtwiddler - which is the Swettenham design? I'm not trying to start a war here - just wondering.
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Post by Johnkenn on Jul 4, 2015 13:56:02 GMT -6
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Post by Johnkenn on Jul 4, 2015 14:04:52 GMT -6
Sorry, not trying to derail the Realios thread...we can get back to it, but I found this about the input transformer stuff dealing with the Type 69...This was from 2010... After carrying out our latest Plot type tests as well as listening tests, and taking the advice of many other Pro Engineers & Clients who have no wish to manufacture a Type-69 themselves, we have decided to leave things as they are, because we and the many pro-engineers who are using our re-issue are more than satisfied with how the re-issue sounds as well as the reliability of our products.
BUT
I will be announcing later on in this thread & others on how to have +4dB coming out of the standard size Helios Type-69, (+4dB is already in the 500 series,0 we shall also be offering an alternative Lustraphone transformer for a small cost roughly $40 for those who already have any of our re-issue’s
There will also be a choice (At no extra costs) which transformer a client wants when ordering either the Standard Helios Type-69 or the 500 Series.
Below are Brian’s latest comparison plots between the Sowter Tapped transformer that we use today, and the original Lustraphone, which is most likely why the Helios re-Issue has an extended frequency response as well as more headroom and an improved performance while working in Stereo.
These changes in specification mean the Helios Re-Issue does not QUITE sound the same as the Lustraphone, but there is very little in it.
To say that the Lustraphone sounds better is only an opinion, I have clients who prefer the sound of the Helios Re-Issue.
"One man's meat can be another mans poison"
Best Regards
Tony.
Tony Arnold (Director),
Helios Electronics Ltd,
www.helios electronics.comAnd When I first discussed with my colleagues and Richard Swettenham about re-issuing the Type-69 while at the same satisfy satisfying Richard's demands to improve upon the original.
Not I or RS had the funds to warrant stripping down an Original Lustraphone TX, as today an Original can demand $5,000 plus and without an original Lustraphone $1000 on a good day, net loss $4,000,
BUT
Due to the skills and experiences of Brian Sowter we ended up with an improved spec regarding the Transformer with very little to almost no loss of the original Type-69 sound
So I have taken it on board for many years now, that maybe an original Lustraphone version could be a seller, to partner our currant very desired Re-Issue Type-69 that we manufacture today, which I and many others prefer the sound of.
Nevertheless each to his or her own, so I will announce here and now, that we have now the funds and have therefore instructed Brian Sowter to carry out the same task utilising both Brian’s 50 years of experience most being likely the longest in Britain, coupled with his skills most likely being the finest available in Britain, to strip our Lustraphone and make us our own clone of the Lustraphone.
Remember Brian was very active with Transformer Design at the same time as Lustraphone, and Brian was Richard Swettenham's choice in the final years of Helios Electronics Ltd Part-1, and Brian will continue to be of service with Helios Electronics Ltd, Part-2.
Brian has excepted the task to carry out a similar reverse engineering job by stripping down our Lustraphone to its bare parts using the same wire gauge, same size, and grade of lamination and specification, the size of the custom manufactured bobbin which will also be the same, as will the wiring techniques. to find out its secrets.
This new clone of the Original Lustraphone Transformer will be offered to all of our currant clients as an update with a small cost of around $40 per module it will also be available as a choice for any of our new clients as to which model they would prefer to purchase.
We hope to have this done within a couple of months
After one year we will Post our findings for those who may be interested.
Best Regards
Tony.
Tony Arnold (Director),
Helios Electronics Ltd,
www.helios electronics.comHonestly, I probably won't even bother with it. |
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Post by Johnkenn on Jul 4, 2015 14:10:35 GMT -6
"The output section is unbalanced and uses an emitter follower circuit and a Philips/BEC electrolytic coupling capacitor, much like what's in the original Helios design. Swettenham found that the engineers at Olympic Studios preferred the sound of this circuit compared to the best output transformers."
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Post by spock on Jul 4, 2015 15:07:44 GMT -6
"The output section is unbalanced and uses an emitter follower circuit and a Philips/BEC electrolytic coupling capacitor, much like what's in the original Helios design. Swettenham found that the engineers at Olympic Studios preferred the sound of this circuit compared to the best output transformers." Keep in mind... The modules were never intended to be used outside of the console. If you want a slice of how it sounds coming through a console, I think some work has to be done. |
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Post by Johnkenn on Jul 4, 2015 17:54:17 GMT -6
Well, you could say that about anything that's not in a console.
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