Mono vs Stereo LP's


I recently purchased a 1958 mono issue of Art Farmer's "Farmer's Market" on the New Jazz purple label (New Jazz was a Prestige specialty label) The record looks to be in near mint condition and was carefully cleaned by me with a record vac. The recording, however, plays with a constant background noise or hiss. The dealer who sold me the record has a reputable history and is telling me the noise is because I need to play the record with a mono cartridge rather than my stereo Shelter 501. I have read the threads on Audiogon regarding mono cartridges which say they can sound better, but don't suggest there would be the type on noise I am hearing with stereo. I have many other mono records of similar vintage and have never encountered this before. Anyone have a similar experience to this?
128x128jyprez
In addition to the excellent discussion thread referral by Cincy bob, I have found that using Audio Intelligent Vinyl Solutions two step process may be an answer for your particular record. Excellent for mono, or stereo records, in comparison to other cleaning products used with record cleaning machines.
Thanks to both of you for the info. As it happens, I do use Audio Intelligent Vinyl Solutions which I would agree is an excellent cleaner ... the best I have ever tried. I cleaned this record before playing and then again after noticing the noise with no significant difference which suggests it is not dirt. The record was also cleaned on a record machine by the dealer who sold it to me and appears in very good condition with good luster and no scratches.
Lots of old recordings had hiss (from tube electronics and pre Dolby/DBX tape recorders). To overcome this most preamps had noise filters, to roll off response as low as 6000 Hz. The best noise filters were "dynamic" (they cut in and out according to whether the music was loud or soft) and the very best dynamic noise filter was a thing called "Autocorrelator" invented by Bob Carver.

Why don't you just sit back and enjoy that authentic 1950s sound?
I have the same record and the same "problem", though I don't consider it that problematic. Your dealer is correct, the hiss will be probably be markedly reduced through use of a mono setup. I agree with Eldartford, though, there are a lot of records of that vintage with hiss and they are still enjoyable. I think the key word in your post is "constant" hiss. No record cleaner will remove that, it is part of the recording.