the return of the HRM (clean clip added)

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mat
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the return of the HRM (clean clip added)

Post by mat »

I wouldn't have ever believed that moving few wires + changing one tube socket could make that big of difference on the amp :shock:

My HRM build has been lacking a good beefy tone for too long. The day before yesterday I changed the V1 tube socket and rerouted shielded wires going to masters and OD pot. This was after reading novosibir's comment of not to put THE wires too close to the tone section wires. Mine did go inside of the tone section wires :shock: :roll: I think this is REALLY important to anyone to try if suffering harshness, lack of od, hard playing amp, lack of sustain.

I must say BIG THANKS novosibir :D 8) 8) 8) 8) 8)

Here is a quick clip with a pair of KT77's. I'll will also try 6L6's asap.

Od master was less than 9:00. Really better sound if turning to 10-11:00
http://media.putfile.com/the-return-of-the-HRM

First time the amp is really joy to play :D I can really dig in with pick without the amp starting to bark. Time to make some music :D :D
Last edited by mat on Thu Sep 20, 2007 10:56 am, edited 1 time in total.
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novosibir
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Re: the return of the HRM

Post by novosibir »

mat wrote:I must say BIG THANKS novosibir :D 8) 8) 8) 8) 8)
Anytime - and nice to hear, that I could help you, fix your prob :D

But the thread, where I gave this advice isn't on this board, therefore I hope not doing something reprobate, posting the link here to my post on the Brown Note forum:

http://www.brownnote.net/forum/viewtopi ... =3691#3691

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mat
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Re: the return of the HRM

Post by mat »

novosibir wrote:
mat wrote:I must say BIG THANKS novosibir :D 8) 8) 8) 8) 8)
Anytime - and nice to hear, that I could help you, fix your prob :D

But the thread, where I gave this advice isn't on this board, therefore I hope not doing something reprobate, posting the link here to my post on the Brown Note forum:

http://www.brownnote.net/forum/viewtopi ... =3691#3691

Larry
Yes, thats what it was, the Brownnote forum! I think Your comments there are good read to everyone :!:

Thanks again 8)
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odourboy
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Re: the return of the HRM (clean clip added)

Post by odourboy »

Mat - Your clip sounds excellent! Sounds like you've got that baby nailed!!
"Let's face it, the non HRMs are easier to play, there, I've said it." - Gil Ayan... AND HE"S IN GOOD COMPANY!

Black chassis' availble: http://cepedals.com/Dumble-Style-Chassis.html
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stelligan
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Re: the return of the HRM (clean clip added)

Post by stelligan »

Yeah Baby! Sounds very good indeed. Congratulations - I see finger blisters in your future 8)
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heisthl
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Re: the return of the HRM (clean clip added)

Post by heisthl »

Great clip - wish you we're my neighbor and could do clips for me...
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skyboltone
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Re: the return of the HRM (clean clip added)

Post by skyboltone »

Oh yes. I do like your style mister. Great Clip!
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JimiB
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Re: the return of the HRM (clean clip added)

Post by JimiB »

mmmmmmmmm tasty!
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nickt
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Re: the return of the HRM (clean clip added)

Post by nickt »

Excelent work mat - that's why I want an HRM ! :D
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pedro
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Re: the return of the HRM (clean clip added)

Post by pedro »

+1 - I like it .....

got me wonering .... I've used coax shielded to run from the tone section of the board to the pots on front panel - keeping as far away from rest of board as possible , but I have pretty long runs because Ive built my prototype in an old PA chassis - I wonder if this will have any detrimental effect on the tone - high end loss for example ?

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novosibir
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Re: the return of the HRM (clean clip added)

Post by novosibir »

pedro wrote:I've used coax shielded to run from the tone section of the board to the pots on front panel - keeping as far away from rest of board as possible , but I have pretty long runs because Ive built my prototype in an old PA chassis - I wonder if this will have any detrimental effect on the tone - high end loss for example ?
Depends on the lenght and on the quality of the shielded wires.

Keep in mind, that electrically regarded every shielded cabel may be regarded as a small cap from the wire to ground - shunting high frequencies.

With a RG174 or similar w/ a capacitance of about 30p/ft. you might be fine, but with usual shielded LF audio cables w/ a capacitance of 100p/ft. or more you'd have a tone sucker.

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pedro
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Re: the return of the HRM (clean clip added)

Post by pedro »

Larry,
I'll measure the capacitance of a foot of it and report back !

cheers
Pete

In fact - I just did ( sudden motivation ! ) and its 40 pf/ft. So maybe OK.

For anyone in UK / Europe - Its Van Damme 268-001-000 SPOFC foil and shield pair.
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novosibir
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Re: the return of the HRM (clean clip added)

Post by novosibir »

If you don't like the thick and stiff RG58, Dumble has used in his amps, then I'd highly recommend to use the RG174 antenna coax! It's about only 30p/ft. - what's the same as with the RG58, but the thickness of the RG174 is even less than 1/8" - and it's flexible.

Best of all is the Belden brand, what you may get at Newark (Farnell in Germany).

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kleinm
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Re: the return of the HRM (clean clip added)

Post by kleinm »

Excellent clip and tone mat! Its awesome to see you get your HRM sounding how you'd hoped! Congrats to you, and great point on the part of novosibir!
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JimiB
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Re: the return of the HRM (clean clip added)

Post by JimiB »

If you don't like the thick and stiff RG58, Dumble has used in his amps, then I'd highly recommend to use the RG174 antenna coax! It's about only 30p/ft. - what's the same as with the RG58, but the thickness of the RG174 is even less than 1/8" - and it's flexible.

Best of all is the Belden brand, what you may get at Newark (Farnell in Germany).
Anyone know where I can buy less than 100ft?
I've been using george L cable and it seems to work ok. It's a little thick though.
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