#153 values?

[Tonegeek]

Any idea on what plate and cathode values are used in this amp?
http://www.youtube.com/watch?v=ap6odoC4itw

From the comments it is #153, 6L6, no skyline built late 80s, early 90s. I am assuming it is a non-HRM.

[Structo]

Don't know but I have always liked that video.

[talbany]

My guess based on the settings (mid boost/Jazz on) and sound would be Non-HRM Classic Skyline 100k plate amp 5uf all around w/maybe a 10uf on v1b...Sounds like an EV-L as well..That will get you close...



Tony VVT

[Tonegeek]

My guess based on the settings (mid boost/Jazz on) and sound would be Non-HRM Classic Skyline 100k plate amp 5uf all around w/maybe a 10uf on v1b...Sounds like an EV-L as well..That will get you close... Tony VVT

Owner states it has no skyliner. He also says the speaker is Emi Texas heat. I found this interesting as well (from the owner):

"The letter in which he informs me that he will build it for me is dated the 22nd of June 1987. The amplifier arrived here in Finland promtly after five (5) years. So I suppose it's built around 1991-1992."

I am looking to build a non HRM and am trying to decide on whether to do a low or high plate version and to Skyline or not. I don't expect it will take 5 years to do it! The Lerche clip is OK, but there are others I like better. The clean seems a bit middy to me and the OD sound was a bit ratty. Still, it was a good sound.

[Colossal]

Man, that's a great clip. It is a nice departure from the usual LC/RF application.

What is happening at 1:10 and 1:50 in the video? Is that PAB with the OD channel or just OD? I sure dig that midrangey honk/bite. Interesting that it's in Jazz mode most of the time. Sounds quite Boogieish.

Tonegeek, if this is not the Skyliner eq, what schematic would the tone stack be coming from?

Thanks!

[dogears]

I suspect that Peter doesn't know that Skyline refers to the clean channel tonestack. I think he thinks it means HRM.

I guess it is a high plate 220/150 Skyline non HRM. Just like almost all the other non Music Man non HRM amps of that era.

Secondly, he is using midboost in conjunction with the PAB. This is why it sounds full and good in jazz mode and at low master settings.

[Tonegeek]

I suspect that Peter doesn't know that Skyline refers to the clean channel tonestack. I think he thinks it means HRM.

I guess it is a high plate 220/150 Skyline non HRM. Just like almost all the other non Music Man non HRM amps of that era.

Secondly, he is using midboost in conjunction with the PAB. This is why it sounds full and good in jazz mode and at low master settings.

Good point. I didn't consider that he could be wrong when describing his own amp. I also noticed no Deep switch which made me think it might be a non-Skyliner stack. I know this has been discussed before, but what do you listen for to distinguish a low plate from a high plate amp? I tend to think the clean sound on low plate amps is sweeter, especially when pushed slightly.

[Structo]

I wish that guy would do another clip.

That clip is one of the better at showing the tone of those amps.

I'm sure he is a good guitarist but it's more what you hear than what he plays.

[Colossal]

I suspect that Peter doesn't know that Skyline refers to the clean channel tonestack. I think he thinks it means HRM.

I guess it is a high plate 220/150 Skyline non HRM. Just like almost all the other non Music Man non HRM amps of that era.

Secondly, he is using midboost in conjunction with the PAB. This is why it sounds full and good in jazz mode and at low master settings.

Thanks Dogears!

Can you recommend a schematic which best fits this description? I have the #124, BM, HRM, etc but don't know my around all the many subtle changes throughout the various eras. I would love to be able to capture *that* tone in the video. Which power supply do you think that is? Precision? Regular?

So, is Peter using the OD with the Mid and PAB? or just Mid and PAB? I really like the midboost. It gives it a horn-like quality that is not piercing or overwhelming. Just smooth like a gravy sandwich!

[Guitarman18]

colossal wrote:

Can you recommend a schematic which best fits this description?

This one is pretty close but there has been a ton of topics on where known HAD builds vary in certain places. I seem to recall dogears mentioning that the CL2 coupler @ .047uf w/ 5uf cathode caps has never been observed in a real deal. Amps that had .047uf CL2 CC had 1uf Ck on V1b. Amps with 5uf on V1b had .02uf CC on CL2. (Apologies to Scott if I'm wrong. I don't recall where I saw that and that may not still be true!)

https://tubeamparchive.com/download/file.php?id=1178

Hope this helps.

Cheers,

Paul.

[talbany]

I suspect that Peter doesn't know that Skyline refers to the clean channel tonestack. I think he thinks it means HRM.

I guess it is a high plate 220/150 Skyline non HRM. Just like almost all the other non Music Man non HRM amps of that era.

Secondly, he is using midboost in conjunction with the PAB. This is why it sounds full and good in jazz mode and at low master settings.

Scott
I thought the clean channel had the high plate vibe to it as well stiff chime in the mids...But kind of hard to tell really given not too familiar with the guitar he has on the unusual combination of Jazz w/PAB mid boost treble up and presence all the way down..When he goes to the OD w/the bridge PU on sounds to me like a 100k..A bit thin in the skin and a little buzzy in the midrange.. A high plate 220k would to me be noticeably thicker there especially with Jazz on and PAB.. What do you think!!...Could be the master is down so low it's choking some meat there!! Surprised that's not an EV.. Sure sounds like one to me!!

same thing clip sounds good though I've heard better!!


Tony VVT

[dogears]

Actually, I have never seen 1uf on CL2. I have seen many many real ones with .05uf on CL2 in conjunction with either 4.7uf, or as high as 25uf if 100K plates are used.

To reiterate, amps with .05uf typically had 5uf bypass. Sounds WAY better to me than the 1uf which I have always disliked in any context.

colossal wrote:

Can you recommend a schematic which best fits this description?

This one is pretty close but there has been a ton of topics on where known HAD builds vary in certain places. I seem to recall dogears mentioning that the CL2 coupler @ .047uf w/ 5uf cathode caps has never been observed in a real deal. Amps that had .047uf CL2 CC had 1uf Ck on V1b. Amps with 5uf on V1b had .02uf CC on CL2. (Apologies to Scott if I'm wrong. I don't recall where I saw that and that may not still be true!)

https://tubeamparchive.com/download/file.php?id=1178

Hope this helps.

Cheers,

Paul.

[Colossal]

This one is pretty close but there has been a ton of topics on where known HAD builds vary in certain places. I seem to recall dogears mentioning that the CL2 coupler @ .047uf w/ 5uf cathode caps has never been observed in a real deal. Amps that had .047uf CL2 CC had 1uf Ck on V1b. Amps with 5uf on V1b had .02uf CC on CL2. (Apologies to Scott if I'm wrong. I don't recall where I saw that and that may not still be true!)

Hope this helps.

Cheers,
Paul.

Thanks for the link Paul! I have that one in my Dumble project file but forgot about it.

Cheers.

[Guitarman18]

dogears wrote:

Actually, I have never seen 1uf on CL2. I have seen many many real ones with .05uf on CL2 in conjunction with either 4.7uf, or as high as 25uf if 100K plates are used.

To reiterate, amps with .05uf typically had 5uf bypass. Sounds WAY better to me than the 1uf which I have always disliked in any context.

Guitarman18 wrote:
colossal wrote:

Quote:
Can you recommend a schematic which best fits this description?


This one is pretty close but there has been a ton of topics on where known HAD builds vary in certain places. I seem to recall dogears mentioning that the CL2 coupler @ .047uf w/ 5uf cathode caps has never been observed in a real deal. Amps that had .047uf CL2 CC had 1uf Ck on V1b. Amps with 5uf on V1b had .02uf CC on CL2. (Apologies to Scott if I'm wrong. I don't recall where I saw that and that may not still be true!)

https://tubeamparchive.com/download/file.php?id=1178

Hope this helps.

Cheers,

Paul.

It seems my worst fears have been realised... I'm beginning to dream AG posts. Sorry about that! Everything I said above is nonsense, please ignore!

Cheers, Paul.

[Colossal]

It seems my worst fears have been realised... I'm beginning to dream AG posts. Sorry about that! Everything I said above is nonsense, please ignore!

Cheers, Paul.

No worries Paul. Thanks for the help regardless!