Reckhorn F-1 and others; suggestions. - Page 2

AlanElsdon · 1st January 2010, 12:46 PM

Just listening to the F1 in my system, I have had the unit for months but after initially using it and not being able to sort out the hum I had put it to one side.

But this morning (Happy New Year to all

) I decided it was time to try again - still the same old hum - so a search revealed this thread. I will start with the hum solution and then get the bits together for the psu upgrade.

Is it possible to get a photo of the psu mod - just to be on the safe side?

Alan

planet10 · 1st January 2010, 04:36 PM

Alan,

You might need to wait a few days. Duo is away visiting his Mom for the holidays.

dave

Ragnwald · 2nd January 2010, 08:36 PM

Just ground the pcb to chassie with a 10ohm resistor.
Not perfect but half the hum isn´t bad.

It´s also easy to disconnect VR1 from VR2, to get stereo subsignal, look at the schematic. But that´s neadless.

The only drewback, is that it has a negative signal amplification. Not god behavior for a passive preamp.

I drive it with a LT-filter at output, and it sounds amazingly well.

AudioDave · 15th April 2010, 01:27 PM

Quote:

Originally Posted by PB2

I have the F-1 on order and should have some comments once it arrives and I confirm the schematic. It looks like a good value for the money and worth a few simple mods.

Pete B.

Hi Pete, I would like to order the Reckhorn F1 but their website says they are sold out. Did you by chance order yours from another site? I haven't been able to find one anywhere.
Thanks!
Dave

Cal Weldon · 15th April 2010, 01:36 PM

You can check here. He advertises new versions.

Creative Sound Solutions - Loudspeakers, Parts and DIY Speaker Kits

AudioDave · 15th April 2010, 01:41 PM

Thanks Cal, I appreciate it!
Dave

planet10 · 15th April 2010, 04:22 PM

Since Bob started adding a few upgrades to these -- regulated power supplies, optional stereo conversion -- they have been "flying off the shelves". I understand there are more on a boat from China.

Do note that the specified roll-off curves are not accurate (doesn't make it any less useful). Daniel & i are working on a set based on the unit i have here.

dave

marchel · 20th April 2010, 12:48 AM

Any comments about the sound quality?

Duo · 20th April 2010, 12:52 AM

I use one of the F-1 units here (tried it before and after modifications). It sounds pretty good; it isn't obvious in the sound aside from the fact it's cutting up the spectrum for the speakers. The curves could be better, but I still find this quite useful when I'm running my transmission line sub.

1st January 2010, 04:36 PM	#12
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Alan, You might need to wait a few days. Duo is away visiting his Mom for the holidays. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

15th April 2010, 01:36 PM	#15
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	You can check here. He advertises new versions. Creative Sound Solutions - Loudspeakers, Parts and DIY Speaker Kits __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

15th April 2010, 04:22 PM	#17
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Since Bob started adding a few upgrades to these -- regulated power supplies, optional stereo conversion -- they have been "flying off the shelves". I understand there are more on a boat from China. Do note that the specified roll-off curves are not accurate (doesn't make it any less useful). Daniel & i are working on a set based on the unit i have here. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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1st January 2010, 12:46 PM	#11
AlanElsdon diyAudio Member Join Date: Jun 2003 Location: Surrey/Hampshire borders	Just listening to the F1 in my system, I have had the unit for months but after initially using it and not being able to sort out the hum I had put it to one side. But this morning (Happy New Year to all ) I decided it was time to try again - still the same old hum - so a search revealed this thread. I will start with the hum solution and then get the bits together for the psu upgrade. Is it possible to get a photo of the psu mod - just to be on the safe side? Alan

2nd January 2010, 08:36 PM	#13
Ragnwald diyAudio Member Join Date: Feb 2008 Location: Gotland	Just ground the pcb to chassie with a 10ohm resistor. Not perfect but half the hum isn´t bad. It´s also easy to disconnect VR1 from VR2, to get stereo subsignal, look at the schematic. But that´s neadless. The only drewback, is that it has a negative signal amplification. Not god behavior for a passive preamp. I drive it with a LT-filter at output, and it sounds amazingly well.

15th April 2010, 01:41 PM	#16
AudioDave diyAudio Member Join Date: Feb 2006 Location: Odessa, Texas	Thanks Cal, I appreciate it! Dave

20th April 2010, 12:48 AM	#18
marchel diyAudio Member Join Date: Nov 2007	Any comments about the sound quality?

20th April 2010, 12:52 AM	#19
Duo diyAudio Member Join Date: Jun 2002 Location: Victoria, BC, Canada	I use one of the F-1 units here (tried it before and after modifications). It sounds pretty good; it isn't obvious in the sound aside from the fact it's cutting up the spectrum for the speakers. The curves could be better, but I still find this quite useful when I'm running my transmission line sub.

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