Comments for page: HF-20 Monoblock

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Posted by Patrick McGreevy May 02, 2012 - 11:56 pm
Hi James. I just acquired an HF-20 that I plan on converting to a guitar amp. It's my first stab at an integrated amp conversion. Dave Hunter has some helpful info and I've found a few things online. Any advice or hints?

Posted by Steve L. April 29, 2012 - 03:25 pm
Hi James, I don't know much about instrument amp applications but I appreciate your posting your experience with the HF20 here.

Posted by James R. Powell III. April 28, 2012 - 11:40 am
I have recently conveted this amp to a guitar amp. The knobs look really bad, it was really dusty, so I gave it a proper dusting. I ordered some gold yellow knobs for it. I have it connected to Vintage Music Man 70's era 4x12 super wide cabinet. I am driving it with some nice vintage voiced pedals and modern high gain sounds. This amp sounds really good. I am doing a strange trick to get stereo. I have a high quality TC Electronic Nova delay. The stereo out goes to a Hughes and Kettner Red Box speaker simulator. I sent the XLR out with a high impedance 1/4"transformer to a personal monitor fullrange. The Red Box sim does a perfect job. This strange combination with monitor up high sounds crazy and enormous. I might get a second Eico. I already have a nice Marshall stereo tube amp 50 watts/ 25 watts switchable. The Eico is lighter but needs a handle.

Posted by Steve L. October 22, 2014 - 08:15 am
Hi Craig, I will be happy to help but I need to know more about your problem. Please email me at: [see homepage ABOUT]. If you can attach a schematic of the modifications, that would be very helpful. Can you describe the "level noise" a bit more? Is this steady hiss or is it scratchy-ness when you adjust the control or something else?

Posted by Craig August 06, 2010 - 07:58 pm
I had a friend convert my two Eico HF-20's into power amps BUT he left the middle level control hooked up and he needed to replace one of the Level pots on one of the amps, the pot he used wasn't the same as the original pot so now I have more level noise in one channel. I want to completely bi-pass these level pots. How can I get this done? I don't think it would be too difficult but I need some guidance.

Thanks

Posted by Steve L. July 28, 2010 - 07:14 pm
Thanks for the compliment, Kevin!


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