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Old October 5th, 2006, 09:56 AM   #1 (permalink)
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Princeton Reverb Questions

In my patient quest to find a lower cost replacement for my departed '64 Deluxe Reverb, I've been trying out as many old amps as I can at various retailers. It looks like I'm still a sucker for dual 6V6's and spring reverb. I don't know if it's me or the particular amps I've tried, but it seems that newer and reissue amps with a solid-state recitifier have a more pronounced attack at higher levels that I am not fond of, plus I am no fan of PCBs as I am handy with a soldring iron and schematic and love to experiment.

The one amp I have not been able to try is a Princeton Reverb. BF and SFPRs are selling for about half of what comparable Deluxe Reverbs are commanding, and correct me if I'm wrong, the difference is a few watts, the dry channel and 2" of speaker diameter. It seems like a logical choice but logic is sometimes useless. So, what I would like to know from the fine experts here, is if a PR sounds similar to a DR in terms of overall tone and the way DRs start delightfully breaking up at around 5, or if they are a different beast altogether.

Also, if you were me, would you spend your very hard earned cash on a ratty BF or a sweet SF (keeping in mind that the white-on-black faceplate goes a long way in my shallow mind).

Thanks to all!
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Old October 5th, 2006, 10:23 AM   #2 (permalink)
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Quote:
Originally Posted by quackerz
So, what I would like to know from the fine experts here, is if a PR sounds similar to a DR in terms of overall tone and the way DRs start delightfully breaking up at around 5, or if they are a different beast altogether.

Also, if you were me, would you spend your very hard earned cash on a ratty BF or a sweet SF (keeping in mind that the white-on-black faceplate goes a long way in my shallow mind).

Thanks to all!
My '68 Princeton Reverb is like a baby Twin Reverb. Clean as a bell. I'm not sure if it even breaks up. But I love it and will never part with it. Personally I would save the bucks and get a SF, as about the only difference is the cosmetics. The SF circuit is pretty much the same as the BF circuit. CBS Fender never got around to hacking the SFPR like they did on a lot of the bigger amps.
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Old October 5th, 2006, 10:38 AM   #3 (permalink)
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there's just something about 6V6s.....
personally, i always preferred the Princeton over the Deluxe, but that's jes' me....i never needed/used the dry channel, the 10" was loud enough, & the Prince was/is smaller & lighter.....
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Old October 5th, 2006, 10:50 AM   #4 (permalink)
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Quote:
Originally Posted by maestrovert
i never needed/used the dry channel, the 10" was loud enough, & the Prince was/is smaller & lighter.....
That's my 'logic' exactly, but if it doesn't break up like a Deluxe, then I'm really not that interested...
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Old October 5th, 2006, 10:56 AM   #5 (permalink)
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Get one, now.

I have a 67 DR and a 67 PR (both blackface). The PR is just a smaller lighter, less loud DR. It breaks up great at 5 or 6 (depending on your pickups) and sounds like my DR. Mine has a 12" Weber in it, giving it a little more bottom end. I would say it farts out sooner on low notes, but then you can switch to the DR , right?
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Old October 5th, 2006, 10:58 AM   #6 (permalink)
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One more thing

It is my understandig that the tremelo circuit is different from the DR to the PR (the tremelo itself). I don't use it so I don't know if it sounds different or not.
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Old October 5th, 2006, 11:01 AM   #7 (permalink)
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What volume do you play

Quote:
Originally Posted by RelicStrat
My '68 Princeton Reverb is like a baby Twin Reverb. Clean as a bell. I'm not sure if it even breaks up.
Doesn't break up? Are you using the reverb channel and do you play above 6 on the volume? I have had several PR's and they all had early breakup. Any modifications?
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Old October 5th, 2006, 11:02 AM   #8 (permalink)
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Quote:
Originally Posted by Steve McGinnis
I have a 67 DR and a 67 PR (both blackface). The PR is just a smaller lighter, less loud DR. It breaks up great at 5 or 6 (depending on your pickups) and sounds like my DR. Mine has a 12" Weber in it, giving it a little more bottom end. I would say it farts out sooner on low notes, but then you can switch to the DR , right?
Now, THAT'S what I was waiting to hear! I wonder why RelicStrat's SF doesn't break up at all? Nice to know that a 12" will fit (providing I get an early model with a removable baffle) as that is the long-term plan.

I guess I'll be saving for a BF then. Hopefully by New Years. "No honey, I didn't BUY it, someone at work gave it to me because it didn't work and I fixed it." That should work.

Thanks all!
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Old October 5th, 2006, 11:10 AM   #9 (permalink)
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Here are some excerpts from an article i read awhile back.

Blackface Princeton Reverb—A Wolf in Sheep’s Clothing

My choice for the third amp recommended for small clubs may surprise you—the Blackface Princeton Reverb (1964 through 1967, but once more, a converted Silverface will yield the same results). Yes, you heard me right, a Princeton Reverb! Hey, that’s a practice amp you say, and you’re right, PRs are not widely recognized as gigging amps. However, under the right conditions, this amp will work extremely well in a small room. Like the Deluxe Reverb, Princetons were equipped with an inefficient 10" speaker. Same thing goes with this as with the Deluxe Reverb’s original speaker. Remove it and install a bigger, more efficient 10", or even better by far, get a 12" Jensen reissue or other efficient speaker with a ceramic magnet. Installing a 12" will involve cutting a new baffle board from three-quarter inch plywood, transferring the original grill cloth and saving the original baffleboard just in case you ever want to sell the amp. But believe me when I tell you the extra work and expense are definitely worth it. An efficient 12" speaker in a properly biased and maintained Princeton will change your tone—lovin’ life forever.

Still another option for the Princeton is to use a second cabinet with a larger speaker. My 15" SRO sounds incredibly fine with this amp.
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Old October 5th, 2006, 11:11 AM   #10 (permalink)
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continued...

Princeton Voodoo

Now if you really want the best tone from a Princeton, the following modifications will lead you to guaranteed Tone Nirvana.

Princeton Reverbs differ from the other two amps we’ve covered in several respects. There is only one channel, the tremelo functions differently, the phase inverter is unique, and there happens to be a slight inherent mismatch in the phase inverter. Match that up, and while you are at it, blueprint the entire power section by matching all of the components perfectly, using the highest quality parts. Also add two 470 ohm resistors to the screen grids of the 6V6 power tubes, which was a customary practice in all of the bigger Fender amps. Having made these modifications, you will come unglued with the overall sound of your new and improved Princeton Reverb. This slightly modified amp will be virtually twice as loud, way fuller, with significantly fatter tones overall. Couple it with a better speaker and you’ll have an amp that screams unlike any Princeton or Deluxe you’ve ever heard. I recently sat-in with a band using one of my blackface Princeton Reverbs that has a 12" speaker installed and the recommended "blueprinting". I easily held my own on stage with a Hammond B-3 with a Leslie 145, a bass player, and drummer, with the Princeton’s volume set at about "8". Prior to the show, I heard a few snickers that my "little" Princeton would be swallowed up by the rest of the band. At least 10 people approached me afterwards and asked where my big amp was, since I sure couldn’t be getting that great tone out of a Princeton. Imagine their surprise when I showed them the cord between my old Strat and the Princeton (with no stomp boxes). They couldn’t believe it.
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Old October 5th, 2006, 11:16 AM   #11 (permalink)
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Fantastic info! Thanks newrider!
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Old October 5th, 2006, 11:24 AM   #12 (permalink)
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Quote:
Originally Posted by Steve McGinnis
Doesn't break up? Are you using the reverb channel and do you play above 6 on the volume? I have had several PR's and they all had early breakup. Any modifications?
The PR is just a single channel amp, there is no dry channel, other than turning the reverb pot down. I'm sure it breaks up I just haven't taken it to a rehersal yet and cranked the volume knob. Can't crank at home with a wife and two little ones. Also I think the Eminence Legend (rated at 75 watts ) may have something to do with it too. Will be replacing it soon with a Weber. I wasn't being too serious anyway, hence the LOL face. It's stock except for three .02uF caps that have been replaced with orange drops.
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Old October 5th, 2006, 11:27 AM   #13 (permalink)
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Quote:
Originally Posted by RelicStrat
The PR is just a single channel amp, there is no dry channel, other than turning the reverb pot down. I'm sure it breaks up I just haven't taken it to a rehersal yet and cranked the volume knob. Can't crank at home with a wife and two little ones. Also I think the Eminence Legend (rated at 75 watts ) may have something to do with it too. Will be replacing it soon with a Weber. I wasn't being too serious anyway, hence the LOL face. It's stock except for three .02uF caps that have been replaced with orange drops.
Thanks for the reply. I don't know why I thought my PR had two channels, confusing it with my DR.
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Old October 5th, 2006, 11:29 AM   #14 (permalink)
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My pleasure! I have been looking into getting one as well.
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Old October 5th, 2006, 03:25 PM   #15 (permalink)
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About Princeton Reverbs.

1. RelicStrat's PR is the exception. In general Princeton Reverbs start to break up at 4 or 5 on the volume. By 6 or 7 they are screaming. Past that it may start to go ratty, but it really depends on the tubes, bias and the specific amp fairy in your amp.

2. Reverb is great.

3. Trem is better than Deluxe Reverb's. It is a bias vary type, and doesn't go quite as deep as the typical BF trem, but it is a rich, complex sound.

4. Most come with Oxford (oxfart) that do not do justice to this fine circuit. A better 10" speaker will do wonders. You can squeeze a 12" in there, but it may entail butchery. I like a cleaner tone with tight bass and put a Weber Ceramic California 10. Although it sounds like overkill, it works for me.

Don't hesitate, get a PR while you can. Later models have cheesier cabs, but the circuit is pretty much the same.

My favorite Fender Combo.

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Old October 5th, 2006, 03:34 PM   #16 (permalink)
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Thanks Paul. It looks like I have picked my winner. However, I must hesitate as $600 - $900 doesn't come that easy for me. However, that's still a far cry from a Deluxe Reverb. I got $1,400 for mine four years ago. It's nice to hear that the SF models are good too and I could probably spec it back to BF myself.

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Old October 5th, 2006, 03:39 PM   #17 (permalink)
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I love my SFPR, it sounds like the big Fenders but the volume is much more manageable. I disagree about the trem though. Because it's the bias type it's not really strong or deep. It does work nicely for a subtle trem effect, but I wish it was more pronounced sometimes. Mine has a 12" speaker in it, I think an Eminence. It's ok, but I'm thinking of changing it for a Weber.

Mine starts breaking up a little around 5 or 6 and makes cowboy chords just ring. Sounds wonderful. If I turn the amp all the way up and have the guitar's volume turned down I get classic country sounds. Turn the guitar up a bit more and it's jangley, chimey chords, all the way up is pure classic rock. Definately a great amp, I can't imagine a DR being much better, if any.

FWIW, If I were you I wouldn't waste money on a BF model. They didn't change the circuit hardly any when they switched to the SF look so that lets you save a few (hundered) bucks which you can use to have a tech check it out.

Edited to add: Mine was made in 1970 and has the screw-in, not glue-in baffle in case you're wondering.
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Old October 5th, 2006, 04:00 PM   #18 (permalink)
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Trem

I've seen some Princeton Reverbs with weak trem. The most obvious and common problem is your bias. Have that checked, if your 6V6s are running too hot, your trem will be weak.

Now, I said the trem isn't as deep as the opto circuits, but it is more than adequate. Let your tech take a look at it, you may be pleasantly surprised.

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Old October 5th, 2006, 04:36 PM   #19 (permalink)
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I've only had mine a month or so and haven't had it past 5 so I've heard no breakup yet. I will be giving it a workout this Sunday for the first time at rehersal. I probably just haven't gotten it into breakup territory yet. They are all different, some breakup up earlier and some break up later than others.

I will say I was very surprised about it's feel and response though. It feels almost exactly like my SF Vibrolux Reverb with JBL K110's in it. Very, very tight feeling and super clean sounding. I guess I was expecting it to be somewhere in between my SF Champ's loosey gooseyness and the SFVR's tightness in the way that it feels and responds, if that makes any sense at all. Of course I think the 75 watt Emi Legend has something to do with it's incredibly tight feel.

The vibrato is very musical sounding and lush. I've never used vibrato much but the PR's vibrato is very nice. It uses a bias modulation vibrato whereas the DR uses the optoisolator(roach) vibrato. To me the PR vibrato is nicer sounding. Plus it makes for a cool light show at night with the lights off, as the power tubes pulsate in intensity in perfect time with the vibrato.
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Old October 5th, 2006, 04:41 PM   #20 (permalink)
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My Princeton Reverb is my favorite amp

I bought a SFPR about fifteen years ago. I installed a 12" greenback in it and used it for a back-up to my BF Deluxe. I sold the Deluxe and the Princeton and got a Mesa Boogie Mark l and used it for a couple years. Way too heavy and too loud. I walked in to my local guitar shop and there was my old Princeton Reverb. Some guy had set it in there on consignment and I got it back for $450. I sent the chasis out to Headstrong Amps and had them put it back into spec. I had them build me a new cabinet (I did keep the old one) with white Tolex and a Wheat grill. They cut the new baffel for a 12" speaker and I installed the same Greenback. Now, I have the best sounding amp I've owned and it looks great. Oh, I also replaced the silver face plate with a repro black face plate. The amp is a knock out. I highly recommend one.
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Old October 5th, 2006, 04:52 PM   #21 (permalink)
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Quote:
Originally Posted by JimmyZ
I bought a SFPR about fifteen years ago. I installed a 12" greenback in it and used it for a back-up to my BF Deluxe. I sold the Deluxe and the Princeton and got a Mesa Boogie Mark l and used it for a couple years. Way too heavy and too loud. I walked in to my local guitar shop and there was my old Princeton Reverb. Some guy had set it in there on consignment and I got it back for $450. I sent the chasis out to Headstrong Amps and had them put it back into spec. I had them build me a new cabinet (I did keep the old one) with white Tolex and a Wheat grill. They cut the new baffel for a 12" speaker and I installed the same Greenback. Now, I have the best sounding amp I've owned and it looks great. Oh, I also replaced the silver face plate with a repro black face plate. The amp is a knock out. I highly recommend one.
Wow, what a cool story JimmyZ. Now we just need pics of your long lost returned love!
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Old October 5th, 2006, 05:04 PM   #22 (permalink)
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Quote:
I've seen some Princeton Reverbs with weak trem. The most obvious and common problem is your bias. Have that checked, if your 6V6s are running too hot, your trem will be weak.

Now, I said the trem isn't as deep as the opto circuits, but it is more than adequate. Let your tech take a look at it, you may be pleasantly surprised.
I did, the tech went through it and replaced a bunch of stuff in the trem circuit and made it a lot better, but not nearly as strong as the trem pedal I have or some other amps I've played. I don't really need it to be super strong though, so it's livable. PR's are great amps though.
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Old October 5th, 2006, 05:21 PM   #23 (permalink)
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Here is an El Cheapo question. Anyone heard of any BFPR type kits or clones on the market? (other than Allen - too expensive)

Those BFPR are hard to find or rather hard to find cheap.

thinking o' buying a clone or knock-off and dropping in a ... well you get the picture.

Thanks in advance - check's in the mail
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Old October 5th, 2006, 06:03 PM   #24 (permalink)
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re: BF PR or DR kits