RCA CA3100T obsolete 38mHz IC - UK Vintage Radio Repair and Restoration Discussion Forum

leakstereo20 · 28th Mar 2015, 12:30 pm

Anyone who knows where to find this old Harris or RCA CA3100T 38mHz IC?

I try to renovate two very well sounding NAD's. To a reasonable price , the 1978 model NAD 3080 was one of the first amplifiers that was able to drive a load in 2 Ohm.

The TO-3's in NAD 3080 : NEC 2SD287 /2SB539 delivers in the "A" version 10 A by max. 120 Vceo and 7/8 mHz .....10A is to the limit when the load is 2 Ohm.

The mentioned TO-3 NEC's are obsolete as well.

Any suggestions where to find TO-3 /TO-204 op transistors with 12A or 15A and the above mentioned specs ..120V / 7/8 mHz?

__________________________________________________ _______________

https://sites.google.com/site/httpst.../home/nad-3080

Dickie · 28th Mar 2015, 2:05 pm

Do you need the "T" variant with its military temperature range? If you can accept standard commercial 0-70C there are CA3100S on Ebay.

leakstereo20 · 28th Mar 2015, 10:01 pm

I did't know that the "T" type had military temperature specs....The CA3100S should do it, if the CA3100S has the same specifications except for the temperature ?

David G4EBT · 28th Mar 2015, 11:42 pm

There are CA3100Ts on e-bay 'buy it now' (six in stock) at £15.09 each, and CA3100S at £6.59 each.

leakstereo20 · 29th Mar 2015, 11:48 am

Thanks, I received a link for the RCA CA3100T, and I have just bought 2 pcs. for approx. 31£ incl. shipping.

28th Mar 2015, 12:30 pm	#1
leakstereo20 Retired Dormant Member Join Date: Oct 2011 Location: Herlev, Denmark Posts: 94	RCA CA3100T obsolete 38mHz IC Anyone who knows where to find this old Harris or RCA CA3100T 38mHz IC? I try to renovate two very well sounding NAD's. To a reasonable price , the 1978 model NAD 3080 was one of the first amplifiers that was able to drive a load in 2 Ohm. The TO-3's in NAD 3080 : NEC 2SD287 /2SB539 delivers in the "A" version 10 A by max. 120 Vceo and 7/8 mHz .....10A is to the limit when the load is 2 Ohm. The mentioned TO-3 NEC's are obsolete as well. Any suggestions where to find TO-3 /TO-204 op transistors with 12A or 15A and the above mentioned specs ..120V / 7/8 mHz? __________________________________________________ _______________ https://sites.google.com/site/httpst.../home/nad-3080 Attached Thumbnails

28th Mar 2015, 2:05 pm	#2
Dickie Octode Join Date: Sep 2004 Location: St. Albans, Hertfordshire, UK. Posts: 1,478	Re: RCA CA3100T obsolete 38mHz IC Do you need the "T" variant with its military temperature range? If you can accept standard commercial 0-70C there are CA3100S on Ebay. __________________ Regards, Richard, BVWS member

28th Mar 2015, 10:01 pm	#3
leakstereo20 Retired Dormant Member Join Date: Oct 2011 Location: Herlev, Denmark Posts: 94	Re: RCA CA3100T obsolete 38mHz IC I did't know that the "T" type had military temperature specs....The CA3100S should do it, if the CA3100S has the same specifications except for the temperature ?

28th Mar 2015, 11:42 pm	#4
David G4EBT Dekatron Join Date: Feb 2003 Location: Cottingham, East Yorkshire, UK. Posts: 5,766	Re: RCA CA3100T obsolete 38mHz IC There are CA3100Ts on e-bay 'buy it now' (six in stock) at £15.09 each, and CA3100S at £6.59 each. __________________ David. BVWS Member. G-QRP Club member 1339.

29th Mar 2015, 11:48 am	#5
leakstereo20 Retired Dormant Member Join Date: Oct 2011 Location: Herlev, Denmark Posts: 94	Re: RCA CA3100T obsolete 38mHz IC Thanks, I received a link for the RCA CA3100T, and I have just bought 2 pcs. for approx. 31£ incl. shipping.