Do any of the F-Series detectors have modulated audio?

[88junior]

What I mean by modulated audio is you set your volume at around 4-5 and the deeper targets come in softer sounding than surface coins. I currently use a CZ and love this feature but I like the appeal of the weight of the F-Series. I have been looking at the F70,F75, and T2, & Omega 8000. Thanks Guys!!!

 

[mudpuppy]

I'm not sure, being new to this and all...the F70 I turn on full volumn, and adjust the level at the headphones, running in DP tones, you can tell how deep or shallow even slanted (dimes especially) typical coins are based upon the sound...I dont know if it is built modulated, or its just seems that way from using this machine so much..or that DP tones assigns a different sound to all 99 integers on the TID and the signal strength on deep coins has an effect? All I know is when you run coil over a coin, you can tell how hard or easy to stab, if its surface, or 3" deep, and any Q signal over 5"deep makes your heart jump a little, just based from the tone. I think running a low sens and thresh gives very accurate target picture on 5" to surface coins, they all seem to scream with the sens cranked up to me..seems I cant tell how deep they are when I run the sens up. Maybe Dave J will clue us in a little.
Mud

 

[ez4sure]

well i know the f70 does in 1f and 2f mode and also in at mode wich is all metal mode i think the f75 is the same way i know the t2se that i have now has it also and its very helpfull on telling how close you are to a target, if weight is a issue you would love the f70 its very light and perfectly balanced. the t2 weighs a little more and also well balanced good luck hh

 

[Dave J.]

Rule of thumb: Fisher and Tek products have modulated audio, and some BH products also do.

--Dave J.

 

[88junior]

Thanks for the answers guys looks like I am going to jump on a F-70 or F-75! Now which one???

 

[ez4sure]

if you can afford a f75se that would be the top dog takes a little to learn how to run it, the f70 is a real simple one to learn and you can get a good used one for $400 to $500 get the 11 inch dd coil if you can good luck hh

 

[pasttom]

Money is always a factor, of course, but I would not trade the Boost mode on my F75SE for anything in this field. F70 is a very good unit, but the F75SE is where you want to be if you can find one in your price range. IMHO
Tom

 

[Cal_Cobra]

Overall the F75 is a good machine, but there's no modulated audio on it. I've been using the F75-LTD since it came out, I dunno, three years ago.

My Tek Omega has modulated audio. It's a great machine, but doesn't get the depth of the F75-LTD in boost mode.

HH,
Brian

 

[Dave J.]

????

F75 has modulated audio.

--Dave J.

 

[Cal_Cobra]

????

F75 has modulated audio.

--Dave J.

Not really in 3 or 4 tone, at least not good modulated audio compared to other machines. In 3 or 4 tone, the audio is more binary, it's either there or not, there's no difference in audio like say on the Omega.

If a coin is litterally on the surface, it will be slightly louder, but a deep coin does not give a whisper type modulated audio response. Case in point, the deepest coin I've dug with this machine was a SLQ at slightly over 10" deep (measured), and it did not sound any different then a 5" deep quarter. If it was modulated, it should've.

Perhaps the 1/2 tone options provide modulated audio on the F75, but I don't use them.

 

[Coilfisher]

I believe you mean VCO audio.

And, I believe it does.

 

[Lakota]

Think Cal is right on the 3 tone with the F75, I have the standard version and almost always hunt 3 tone and honesy prefer it to hit hard and loud no matter the depth. A life of loud sounds has taken its toll on my hearing and with my tesroro a good set of head phones is a must due to the modulation in my machine.
Deepest coin to date was a 1918 merc at 9-10" and real close to old tot lot equipment, if it had been a faint tone I may not have found it due to the competing metal poll that was close by.

Hope this helps a little with your question,

Lakota

 

[fjs440]

Reading these posts, I am not sure what modulation is! Some people refer to it as being louder and quieter and others as a change in tonal pitch (frequency.) What is the definition of modulation?

On my F70, items seem to blast through or I don't hear them. Very little change in loudness. I see people write about the treasures they find from very faint tones. My MD seems to only blast me. Maybe something is wrong with my F70. I know my ears are bad.
__________________

Fisher F70 w/Fisher 11” DD and NEL Snake Coil
Fisher 1280-X w/8” Coil
Fisher F2 w/4”, 8” and NEL Hunter Coil
Makro Pointer
Killer B Stinger Headphones

 

[REVIER]

Reading these posts, I am not sure what modulation is! Some people refer to it as being louder and quieter and others as a change in tonal pitch (frequency.) What is the definition of modulation?

On my F70, items seem to blast through or I don't hear them. Very little change in loudness. I see people write about the treasures they find from very faint tones. My MD seems to only blast me. Maybe something is wrong with my F70. I know my ears are bad.
__________________

Fisher F70 w/Fisher 11” DD and NEL Snake Coil
Fisher 1280-X w/8” Coil
Fisher F2 w/4”, 8” and NEL Hunter Coil
Makro Pointer
Killer B Stinger Headphones

Modulation: variation in the strength, tone, or pitch.

When you use most tone selections there is a difference in the way shallow or deeper targets sound.
Something deeper you can hear, something shallow is louder.

When you hit the pinpoint away from the target and move in you notice the sound goes higher...also modulation.

 

[dfmike]

I wasn't sure what modulated audio meant so I made a search. I stumbled on this recent video by Keith Southern.

https://youtu.be/tXZn_lRJVSQ

I'm still unsure if there is a difference between modulated sound and VCO. Are they synonyms or different terms entirely ?

 

[Jackpine Savage]

Mike

Your F19 has VCO audio where the pitch of the tone varies with signal strength. Your F5 has modulated audio where the volume of the tone, which does not change in freq or pitch, decreases with depth. If the F5 has a delta pitch mode the tone will vary by conductivity rather than signal strength.

Confused yet?

Tom

 

[REVIER]

I wasn't sure what modulated audio meant so I made a search. I stumbled on this recent video by Keith Southern.

https://youtu.be/tXZn_lRJVSQ

I'm still unsure if there is a difference between modulated sound and VCO. Are they synonyms or different terms entirely ?

VCO is voltage controlled oscillation.
It is the electronic process that our pinpointing features use to change the tone as we get closer to targets.
Oscillations increase...the pitch changes.
Modulation means a change...so I would consider this a form of modulation.
In that vid as the target comes closer to the coil the louder it gets, there is a change...also modulation.

Again the definition of Modulation:
Variation in the strength, tone, or pitch.

 

[dfmike]

I think I get it. Regardless of the differences between VCO and modulated audio, the two give you depth perception right ?

In the T2 video link above, I can't really perceive a difference between the audio of that detector in 2+ tone mode and my F19. Perhaps my hearing is shot.

 

[Jackpine Savage]

2F on the T2 is VCO audio which explains the similarity to the F5 that you heard. Also, Keith did not mention the difference between the VCO audio modes and multi tone modes in his video.

 

[MarkCZ]

Man this is an OLD thread.
VCO, changes pitch and its intensity the closer the coil is to the target.

Modulated audio,
Doesn't change the pitch of the tone, it actually doesn't change the TONE! and in all the machines I've had its operational in the discrimination search mode. The greater the distance between the coil and the target the more distant the audio tone (softer, more faint), and a close target its more of a near sound (Modulated)

Non Modulated audio.
If the detector detects a target the audio response as far as volume is the same, nothing is faint or distant in sound.

Mark